Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2969dfd5c7464b…

MALICIOUS

PDF

83.6 KB Created: 2021-05-29 05:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4539929c8a7eab547bca2bd5ad9f062a SHA-1: 6390b62b11e6a05bca379ba6bebdf68350689675 SHA-256: 0e2969dfd5c7464b0ca4e4f39ff097ad8cff944ddfee97eec82e8d5402bdf584
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://golowaki.ru/123?utm_term=beowulf+analysis+and+summary+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423757/normal_5fd7cfc7713d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_6068f3badc1c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_601d059e6f133.pdfIn PDF document text
    • https://wivapofeselaf.weebly.com/uploads/1/3/5/3/135317026/wejumezuja.pdfIn PDF document text
    • https://radoxawema.weebly.com/uploads/1/3/0/7/130738714/jipodatewifotu.pdfIn PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/fusuburuvitejupepoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_603100a87e64c.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/vedanejitamakopuxuda.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/5121524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_6019ac484b191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_600bc69e789f2.pdfIn PDF document text
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/womonozi-gabanosak.pdfIn PDF document text
    • https://walotowujiko.weebly.com/uploads/1/3/4/5/134582573/narivejimexopug.pdfIn PDF document text
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/ligiwalu-ximek-jusapojuduzomik-fajufog.pdfIn PDF document text
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/04e27cc65eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393029/normal_5fce657f4c74c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_605055b649b3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 5432 bytes
SHA-256: 7f5e05ce764f9908f38d9150dd134e21391148b953da8d03ce91ba40dc8ccfbe
font_01_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 10632 bytes
SHA-256: 93b40eb56ee3dd14a191ea7234843ea4420c844a21749a094b018f9cf2bd5cda

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