Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bd5b674ac408aa…

MALICIOUS

PDF

74.8 KB Created: 2021-06-14 06:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39f22c515fe4a29f3adbe631bb3a378f SHA-1: b603b26e48cd9d73cca8ad6111460cf3859ee99c SHA-256: 78bd5b674ac408aa5c6a64d64831b87ccbef2ca2a12ba73e846cd5cfc5ef16ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious sites. The document body, though partially corrupted, contains keywords related to video games, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://huntic.ru/uplcv?utm_term=how+to+power+level+alchemy+skyrim PDF link annotation
    • https://agatanorek.com/files/file/gubawizereruterux.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/28747439044.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/4r7h8cpg9l2e1e99fpii446nbr/velozovesimawupemez.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/747a4e27c534e14777b5f3985da7249e/puzudedeseradufogunig.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/winafudulexatal.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/67826459831.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/99280342635.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/4bee021d27f3559a54148d2721623e95/tokesafoxexex.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/buvibebinarisixivir.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160853a1f91279---11728521098.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce58841ff---bosogogefarivedamosisekaj.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/913d6e1c22caf6bfca509b93417023e6/61622283647.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/db5f9bc88bee34b3f3e4e07070f2f5b6/dikisenafaredumoganajawi.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/3250f63244caa34867dd9ceec78a681a/35999409566.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/obb5kr22aqdmph1ig7uittkl60/57036964423.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca321615fe---kodunubukalotuwepam.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbf720c2bc---84933465915.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dc7e9912a38ab2a5321afd3feeb9eced/murivakexizopuxox.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/3841182225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 5132 bytes
SHA-256: 1d996c69defdaf783b603ae96dd63046221feac6e8df60b2dd28585daaca9cd3
font_01_sfnt_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 11000 bytes
SHA-256: 576a42703ec110f1bcdaa17e7215aa51b2c1cf8a530394cedd89c7d8cd457168

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