Malicious PDF — malware analysis report

Static analysis result for SHA-256 487cff3c9e12bf02…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 01:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 313104c2069f1f05da4a403427d5f21f SHA-1: 549ded5040cea2728f50be7327aa78a8ef1a9c14 SHA-256: 487cff3c9e12bf02f119998fe76063c30b2aec3a980c639295d247cea3777807
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://tradeweb.es/userfiles/file/70410503886.pdf In PDF document text
    • https://unaizahic.com/Files/files/gafefipusot.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64613887409.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/xudikagizuperilamor.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/nupamuzupav.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/deleraluranumezapipero.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/jaromax.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/52954654947.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/d052a8d1817cfd9bed7a6dc1fe06ef9e/vifutasisobes.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/33902382322.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/fsuj05iusbttbj8pcg1uh6fs4u/kopamuzajepuzejuz.pdfIn PDF document text
    • http://teknis.it/userfiles/files/44117982070.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/45887607433.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/79333623305.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/b19mq56lugc3404hsafol1g4p5/lesulukumosasetu.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/7151b666c4ff8125b6796358f5287ad8/pivivugalu.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160704898a201e---82764763354.pdfIn PDF document text
    • http://mosjob.ru/images/file/91873286764.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/35094770486.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/muxudesikad.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/37932592487.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c351cc825---37966159729.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/4417813f9cdc564583359492742c4663/99385481243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=bengali+horror+story+books+pdf+free+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 11260 bytes
SHA-256: 9e127e0d51d8d2ae92c80f346f3e26f3f472807bd670c0df8fe686b12421f4e6
font_01_sfnt_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 23096 bytes
SHA-256: 45c4b9c6efd9580c40bad6ec1b0895178708fb8376f4325e6f03fa5e8132aea4
font_02_sfnt_off00012d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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