Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a07361152549e6d…

MALICIOUS

PDF

72.8 KB Created: 2020-12-27 20:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6b7708d09d2fa7040707e4dad91dfdc8 SHA-1: 0fd09a29a02ceea3228233668bd9b87f32f52fec SHA-256: 7a07361152549e6d6c262452fe099e62a3e800f35a6efbc8851c22dc43789796
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam operation. The presence of a URL with a 'utm_term' parameter indicates an attempt to track user clicks, likely leading to phishing or malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, possibly involving embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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
  • 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://trafffe.ru/123?utm_term=vitapur+water+dispenser+filtration+system PDF link annotation
    • https://cdn.sqhk.co/sulojumi/iaggThh/54663426234.pdfIn PDF document text
    • https://cdn.sqhk.co/jasolugud/jgdvgje/80390663408.pdfIn PDF document text
    • https://serivuzoforin.weebly.com/uploads/1/3/4/3/134334639/7262748.pdfIn PDF document text
    • https://cdn.sqhk.co/duzokezubeka/UohT4Fb/robo_legacy_strange_robot_war_battleground_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401697/normal_5fcb5cafa225e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5fa9ce8531f46.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/lizoze_tomimos_fovenizo_rexigix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5fd76f64904b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449170/normal_5fd0a9edafa03.pdfIn PDF document text
    • https://pozujejax.weebly.com/uploads/1/3/4/6/134679154/2f0efb2ba.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/TjeSWVV/83087617680.pdfIn PDF document text
    • https://cdn.sqhk.co/fomavulobet/Oulskij/sirugikasaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5fae4df2c7c79.pdfIn PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/bexulodezi_mololomaniso_jivexubuwugi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wumodukubaru/puxagirajanidulejat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 5228 bytes
SHA-256: 2cd44bf480b4bb2944d193a3669dbf4a982c3b4b32d63b4d99e367da57895d52
font_01_sfnt_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 10476 bytes
SHA-256: ec7a28d337cc2f1c099ad4c3f5248ed539cd2495ce4faab10a994c73bdb1089e
font_02_sfnt_off000107e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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