Malicious PDF — malware analysis report

Static analysis result for SHA-256 9455844f9073061d…

MALICIOUS

PDF

92.8 KB Created: 2021-07-14 00:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 946903b3b53f71095607084ff764da50 SHA-1: 397130867c3ce06c0b0ccf4a8bd00b568277a6e5 SHA-256: 9455844f9073061d2efd702337f3848cf05fb2108bf0bb5ec16aa7208eac2929
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086276f1e844---maranexemabogupidadakos.pdf In PDF document text
    • https://mmszke.hu/files/file/17909230766.pdfIn PDF document text
    • http://sjhtractor.com/d/files/devuxofikowewuxewob.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c34c787cb---55039573069.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b354fe67707---volufono.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16098973ba3c82---wiwixoroxuwifumamezi.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4673007c---ketewuzedawikapa.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ij42kqd289j2oldr09lm3tb040/80261777818.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16082e28e3ca2e---96477252697.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c44c63466821be5ce044f71c1abe873f/falamasusakine.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/883988879.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/46306780fd8a2c765f25797c0c56f6a0/jovegabadipukaxegulus.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/283f1dc02cb97bbcff069e08fde53e25/nomoretiwafomofinidiges.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/dokolivofavowadub.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8e4c11947ffaa1461c8b76c9b2205e25/vepitanarowuka.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/14f0e8c464ef9a612d48abc9536ef574/vadido.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7878e0364d3a3e2b414cef198e67900f/fesutalebenunixul.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052612092673499.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/84812542426.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f2bb4d7a3---dopirinopekizixutomadovos.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/pojemub.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/aaa696a34843828fccce15466aaf5f24/59088786739.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/04c791873447486467dca19ddb656f09/97364302275.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094bca8f0857---puzamogafezupiliginuwelis.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/dc42f6bc1f81e5fcc0f36a0b631b3a23/91539553611.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea4baa4254---batasosasidal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=can+you+get+pregnant+while+on+your+period+with+precumPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 11124 bytes
SHA-256: 414d8d0540b6af39a4ae002be6855b16506696a57d2eb9f7189c1275599260b9
font_01_sfnt_off00010b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8D 16396 bytes
SHA-256: 0d5ffd35431de3a46edebb3e7d04db42186100d4a60b404ad8ca180934dad6cb
font_02_sfnt_off000121a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 16624 bytes
SHA-256: 7594c451a648ff9e994f527844f48122d9869311be2d51f75c586f7d5a971240
font_03_sfnt_off00014c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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