Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6e86d65582ca50…

MALICIOUS

PDF

86.0 KB Created: 2021-08-16 11:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 1256482e43ba70408a23683b103e75a5 SHA-1: 4bb7e8477d52f9de7d5bf529b5d9cd414c62a304 SHA-256: 3f6e86d65582ca501abb53d1f3c477f781cc495f952552fd251029a9917430d9
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f790458a8d---vexiz.pdf In PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/pupidoxefugobatatalok.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/e2rng8e8fd7srseu57ji3otm84/56859531294.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/69fda4eb054af1ea63e2937d7ec0de76/lozeponeluzu.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/24532316021.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/25631927909.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/8b3d72b4232180544ef7133de50b8726/robomuzujefugaxexu.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/61399200659.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed82579eb82---kavejovujojegekilabipav.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/18ed249fc93fc8ab7ffcda46455d8b0c/sadisepanulemunik.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3bd94391e---79026237663.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/tonudukiwojewisiweto.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/d63289c1062717e7ff40507fe9106eaf/naguporet.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/1653c4691233c770daa5a545fa34bc09/wenutovipiwa.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbade210a3---69025725627.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/14d1a8a411156915e6175835268a5405/19784084501.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c42bee436bf---89903618894.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/94689654669.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/45372214511.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/59238919382.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ed44161b23---52835818019.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/tofafovasiletumufab.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/wilitubagemirokasemosuv.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4e1d95e68---63761307098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=om+namah+shivay+bob+marley+mp3+ringtonePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40A 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 11216 bytes
SHA-256: d99048ed513ce84b99d4140607788b1f660e0cc390f7f39030494015ac9ee195
font_03_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 17640 bytes
SHA-256: 43bd6faa987f4b0951f01f8b1abe057531e12a511bfde15c0e6dac1670131dbd

Open this report in the interactive analyzer, or submit your own file for analysis.