Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6addc0e9be7ae2c…

MALICIOUS

PDF

74.2 KB Created: 2021-02-11 13:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 82549eb03b0ce1f4fce1d8bf66923f34 SHA-1: debb0ec20c28a61a479f363dc950290346bd8b83 SHA-256: c6addc0e9be7ae2ccbab41dbd26907497233b9188ca46fd810c95f3118e4f027
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to link farms, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/aws?utm_term=apeman+camera+user+manual PDF link annotation
    • https://cdn.sqhk.co/lepudijazur/hfjjic0/zig_zag_cones.pdfIn PDF document text
    • https://dukilukisa.weebly.com/uploads/1/3/1/0/131070258/lagudaxojixepazo.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/bPgggcC/67797743009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_60200c07ae1da.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/39ed43ebe953abd.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/cv9hbtd/diy_clown_costume_girl_scary.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/1bjbamx/assistant_professor_jobs_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/gjiJJyb/figalimunebokokap.pdfIn PDF document text
    • https://dezubawutojowi.weebly.com/uploads/1/3/1/3/131398539/penawakej-jetob-nenafipifoma-lovuxiludeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fd1e8c8102ef.pdfIn PDF document text
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/2718354.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/wujapu/68350529656.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/bootstrap_form-_control_width_auto.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/gta_3_cheat_engine_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/62663709211.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/nukajobujebipabigot.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 5068 bytes
SHA-256: 922f991a448b5fa0672ce4ef05f8f1a452c64d7cff51ad1693643afa405cb989
font_01_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 10228 bytes
SHA-256: a3cc1ea5afa63b4554e3ba392f41be7da3bd928570c846a6e4d0dc464001557e

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