Malicious PDF — malware analysis report

Static analysis result for SHA-256 f196a12d6b818340…

MALICIOUS

PDF

84.7 KB Created: 2021-09-03 16:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c061e3e0f7363ca451d05d460df80b81 SHA-1: 437a293ca696cb3e484fda32916efbddc3e4a749 SHA-256: f196a12d6b818340b52cecde1c3d64cd273b44783bcf97dd513521613f9b13b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to trick users into downloading further malicious content. No scripts were extracted, but the presence of multiple compromised URLs and the ML detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e490d02dd---tobodawe.pdf In PDF document text
    • http://www.aluvascientific.com/UserFiles/file/fojef.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t1ajifpml023dfbphn6mcm8jmi/46509346062.pdfIn PDF document text
    • http://www.polni.si/Images/files/towijutifogoji.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7643342c45870dec537a326e6724d889/31111716725.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/sadukagugorofukap.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/84155539059.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/nuqp102jcd6est3bkott2rpbrl/tiziwaxegijemexe.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0afaa6c9---dijokumolabozet.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082997547a11---malomabopejizamakukexajog.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/9272526b498c7898c19ff6224a5746de/pemapuwal.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771165293d5---wosiwozofa.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/ravasimemugewibov.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/ab6cb9c5217bf4eb50598de85639aa6e/tutesa.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/14164374145.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/liwiredomumasovevetivoret.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/tazinagujufusokabe.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84665fe09---poxexuxosow.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/wekam.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/27528707375.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/welusawarafupu.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/49240122726.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7c1e311414---jonupetines.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=huawei+router+4g+e5172+manualPDF 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_off0000e3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 10896 bytes
SHA-256: 99be3020aa79159faf663b5d0f9126f8bd67eeb1fba94f114dda371cb3bc7b13
font_02_sfnt_off00011547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 18388 bytes
SHA-256: e902553050ceb424d36ed4ac40bfbdb6661e0b9d3305b79338c12f17606f2691

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