Malicious PDF — malware analysis report

Static analysis result for SHA-256 327b0f3e9893becf…

MALICIOUS

PDF

74.9 KB Created: 2021-09-05 21:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 01deadf7986e3b77af986bf4061656bd SHA-1: 515ac0641072d216f3719922e4a78000bbe069e6 SHA-256: 327b0f3e9893becf0a85f52e45228592fe588bc8180596886b39111ec06ea098
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress upload directories, likely serving as a distribution point for further malicious content. No scripts were extracted, but the structure suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8549

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 http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed8723735a---79772622013.pdf In PDF document text
    • http://esrafisek.com/images_upload/files/61449421645.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/14523466697.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/o6u7reu237te7daj1mosk4fssk/keserefupina.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6d4f2f3cf---93140484856.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea91cd358---26554376750.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/f70122d54af8d35f1bb84aa16bff7936/zevajolobegulelazin.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/32359633274.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f99f997d2f---16344649730.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/7966215381.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/gifed.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/desifetulinonome.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/xopobodimik.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/94461105433.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad075b5ed9b---regejogufelepajoku.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160e2e0532a124---16780405533.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/xivododavetusevob.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/91965590582.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/20613911dea59ff2e4c0d297e82fda74/lusozuledezosapivigomova.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/mulidenupunaloko.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/34324178548.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/db747a1250u3dfbkjpdq8mhal5/68796610008.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16100ccb6862db---62360470618.pdfIn PDF document text
    • https://tonitomov.com/picture/file/babuxidajejoritudekofot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pardayanlar+serisi+pdfPDF link annotation
    • 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_off0000cfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD1 19524 bytes
SHA-256: d538d4e99bf5ab63d600b711a04fc383f0f4dfb750750a871f0d4ad6e05b34c1
font_01_sfnt_off0000ffd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 10388 bytes
SHA-256: 870a70a87e233e76479b535fa34c292d82c3b1d8a487dedcf2b86bbfcc322a50
font_02_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1