Malicious PDF — malware analysis report

Static analysis result for SHA-256 691126ecd2a4ae13…

MALICIOUS

PDF

88.7 KB Created: 2021-06-30 20:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 00c5b905b29d33d5e8988cb982e026c6 SHA-1: 4006ae364592e7690a34c56d311fd52cf867494b SHA-256: 691126ecd2a4ae138509666fcd915687391a0ca55645269b1855215ca80cada0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL findings are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://accesoriosalmayor.com/images/userfiles/file/janudanukuselaziwebow.pdf In PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c8af496300f---63255228690.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd73a390da---46831779972.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/59295945151.pdfIn PDF document text
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/tofexanibewakikatuber.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/jimerenolo.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/saganokosu.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/17284803a7968669f037e36870a7615d/nogukarolunepaxugato.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/54af50f786926c1ef2e97c7c529bba9b/85019975706.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/51415838821.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/e5b39b7c412a4f4c7c72dba54ff4de96/53615205200.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/3fi5goq5sbfhn843b78i3egjk0/forofusogugezaj.pdfIn PDF document text
    • http://atek-ent.com/upload/file/89144787977.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac2bbc0002---63688974579.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/r0t3esu2t23qras3sorcj27lik/56018394772.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e658d8e37---nikibifaxujuven.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ubd049mjdqnq8abful62lmgjbe/sunakofutovakef.pdfIn PDF document text
    • https://cristalensi.com/public/File/razufadumewapofomal.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/90327991585.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c5718e991---24421466319.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7af56d385f---nemetusewonidejapufa.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/45482250613.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8444a6b55a99340fd7fdf71e37415c1e/nifufuvabujefodesitizi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/gixorax.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/24200858804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+skin+collector+moviePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 18700 bytes
SHA-256: 709fac24fe9832fef1c70782400e01342c71e8f8cae8cf0a3ece073b5357bc63
font_01_sfnt_off00012476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 10456 bytes
SHA-256: 4dae32ef414ad90ebc96848fb608fc8edbec67fe9196312f230a1057e89aafb4
font_02_sfnt_off00013c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1