Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a729c2a04994d1…

MALICIOUS

PDF

82.8 KB Created: 2021-01-25 17:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c88890c4f00fff1fccfc3f513b746208 SHA-1: 2931f5c44434ed90034f8f263d8cfe1a58304a03 SHA-256: 83a729c2a04994d11975172a3945609794c53188dfeac9adab5e96a33b66f7df
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests it is presented as a report to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafficel.ru/aws?utm_term=beveridge+report+full+text PDF link annotation
    • http://vas-rem.ru/disco_zoo_cheats_animalsrqqdw.pdfIn PDF document text
    • https://cdn.sqhk.co/bizufunido/avQdibz/24468981707.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/kgjhBhf/57230925509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5fd10d2ed86a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381347/normal_5fe45c7420d86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fcb101664331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_600771d154d5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474720/normal_5fffb0db49c4c.pdfIn PDF document text
    • http://siondez.ru/67843089712jl5t3.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jgxkrgj/sijemiv.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/WVLejds/potaliledanasoz.pdfIn PDF document text
    • http://imedo.ru/47671834351ezo7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417534/normal_5fcc5f4d726b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kotodur/nipapoligutabatevu.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/67701296188.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/premier_league_live_scores_bbc_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/felubalu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/sewipakudujovel.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 5000 bytes
SHA-256: 8a2c409979d12457bc97210e9a26326f17ecc9e4660599fdc4222187ba2ef1a6
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 11376 bytes
SHA-256: edec6b69db49616748a039bbb83cda40a1a42f67411b6d45d16f85ccac4791c7
font_02_sfnt_off000127cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CC 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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