Malicious PDF — malware analysis report

Static analysis result for SHA-256 01921aac20a60e79…

MALICIOUS

PDF

64.0 KB Created: 2021-10-04 19:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b799d0f5a21608f44846a22ac36ca44c SHA-1: 5e79bc3be2680d6d7d0a803393c89e336070130f SHA-256: 01921aac20a60e79b86d877df60f73aa769609ccd1341de18f64d20a3723f98d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://felixtrail.com/imagini_ws/70773477431.pdf In PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/68163909289.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba9dd4c33---63155217366.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/80807022755.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/kukamesajuzuvo.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/5229371635.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/81975473786.pdfIn PDF document text
    • https://il-gusto.com/images/file/wofomuzoxaxojikurenifa.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/fajaf.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/75279744397.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/50396024906.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/wovutipefenetolusaxonitup.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/33986601643.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/9617306696.pdfIn PDF document text
    • https://csn-alliance.com/data/files/70219976124.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/64527767141.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/pegogilibizekemafemapujub.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/xixisusuzuxefoxowasoseriv.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a417d309e5---10971086418.pdfIn PDF document text
    • https://rosycaffe.com/file/26470887605.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/jebakapigosososelibepev.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/86957892128.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/gipoligiran.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=isomers+of+hydrogenPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 10468 bytes
SHA-256: d88b16bdb04b09aa4b3e73f7056e9e5c7f09f3fa75bc65414f7a5830d3f3de4e

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