Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac76fe9537c108fb…

MALICIOUS

PDF

67.5 KB Created: 2020-11-18 17:35:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 10b27eb3405dc9f62e36b8d68c0fac59 SHA-1: d26060420efca17c65fdd4fe4d51cb9b613a3a22 SHA-256: ac76fe9537c108fb62c85973a4b3f5c10f4ab3cba61e38bbc30d41aeb58cb273
156 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 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://traffset.ru/strik?utm_term=organigrama+de+mercadotecnia+de+coca+cola PDF link annotation
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/bc2eb9d8422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5fa783d6c66a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fa7dc98961e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_5f9d5799745ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f8c549de1d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f8efffc3b112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fabf59e9dcd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_5f9916abe25fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f93bf7202b7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff76c161-dee4-4b4e-8070-c56d357cbbbc/foxubutuveledidijida.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/22048728128.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/before_the_flood_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/frappe_recipe_guide_roblox.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/hydroclean_ez_fill_valve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7d367b-0840-4067-91f7-0ea53406c53a/makowonojekatonoreb.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_off0000ca7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7B 5108 bytes
SHA-256: 5dce7720c0a7ca29d4973e1c8ae90dafb2407293b6b33a6ba78f46b6ea574f38
font_01_sfnt_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 11528 bytes
SHA-256: 44244bbf7acb76d5d2c738ddd1965d8ebbb1ea79129bf9fcac2275c26d6de21f

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