Malicious PDF — malware analysis report

Static analysis result for SHA-256 d462c7d5abac075a…

MALICIOUS

PDF

103.1 KB Created: 2021-06-25 18:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3868114dff3c919acaa945c0072f6289 SHA-1: b7554f74292dcecc1e16ce012cb562735554bce0 SHA-256: d462c7d5abac075a3e65b16ed136590b30fb2fa2830a859696f709ea1dba77c1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised WordPress sites. The presence of multiple embedded URLs, some pointing to potentially malicious content, supports the conclusion that this document is designed to lead users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/l24d8pjuns442531i5kal10fh6/vibomememo.pdf
    • https://mimpiindah1.com/contents//files/94306954966.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160847ac73c37b---65960172670.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8eaeqlpppo3vvbgb87thfo5n1o/63444429238.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1c0572200ce7fe88f29945dc34d74123/70886355264.pdf
    • https://feniks9.ru/ckfinder/userfiles/files/pubobagefevazego.pdf
    • https://akapacha.com/userfiles/file/77022943356.pdf
    • http://buchtel1967.com/clients/26382/File/99633162424.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/k1h4k0r3tdp4pbk8ef2usidgv4/86510755259.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160aca368f1d25---13068364824.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/2bd3555473033389607eee7e736234b8/komojetokolejugisibideme.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/80340717181.pdf
    • http://hoangnamjsc.com/upload/files/xusele.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b282eeee314---58045459153.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6dbba95cca9a1dadf8d93981611ef3cd/66150315298.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5924a66f733c8faed528c235b2136ce9/felotodiwug.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b6afcece5f6a1d63df4a7f4546e63ef5/vomixiferog.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be55e8153e9---13604194651.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/v54lceo4qn6m9jclo1fgtek4bu/lusitelubirigajabu.pdf
    • http://lycee-elm.org/userfiles/file/woruzimepok.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c4086cdfa---40775270866.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/5af7143724abc3dd3f20aa2e7f5b9051/7816113203.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/428f574d2f6c67eb6694ba1fcd53e864/12079711377.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc7c18392a---tuzidugesizegoxuvem.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/6ku3bssb5sfagtru5nklcl2ihb/13881029245.pdf
    • https://artasedanasingaraja.com/uploadfck/file/ditit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=it+books+for+class+9
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f0a.bin
a3d3948c8d1828a734c4c51a99a65b141b61374787ce81737ab65c8424cb0d6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0A 10352 bytes
font_01_sfnt_off000146af.bin
552584f9bd8008da0355a554cd55dee678b38aa4a96274a4f7dd9dc57a8828dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x146AF 18200 bytes
font_02_sfnt_off0001771a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1771A 16792 bytes