Malicious PDF — malware analysis report

Static analysis result for SHA-256 084faa12b757d572…

MALICIOUS

PDF

81.6 KB Created: 2020-12-30 00:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e36aab6c82858e39e0a716089ea82a6 SHA-1: 97ab089d9f33cf5fa33f9bcf9d902bc7f110d2b2 SHA-256: 084faa12b757d572f360f8341a18cf66e6ac5283c9e7973a4be7d991425e094c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are structured to appear as SEO-optimized content, suggesting a link farm designed to attract users searching for specific terms like 'medieval war games'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?utm_term=medieval+war+games+free+download+pc PDF link annotation
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/928df1f.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/hfghjfk/gafepewetu.pdfIn PDF document text
    • https://cdn.sqhk.co/forokuxodel/jbRhfw0/77494160385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472764/normal_5fce44cd24b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fa022f88de71.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/NJJgjU7/damenit.pdfIn PDF document text
    • https://cdn.sqhk.co/juzogimuju/hgeja4j/figij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378621/normal_5fcea60c9a7f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_5fbc39324dc18.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/libusamagowuvo/41060295928.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/wusebofemaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/notification_volume_android_pie.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_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 5632 bytes
SHA-256: 52b914569dcebab5eb0f721935298ec33ac0209e80d6db3d769e850bbe098bd5
font_01_sfnt_off000115aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AA 10512 bytes
SHA-256: c3e072f98f42d258eee5bdc1aaecd4f26e10935b3798d5a8ed2ce982670d76fb

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