Malicious PDF — malware analysis report

Static analysis result for SHA-256 460bb624f810f364…

MALICIOUS

PDF

69.2 KB Created: 2021-06-01 17:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7aadf3b1acdd6ede8c4e9cf839a25a00 SHA-1: 173960d73f6c266f8712eaa749ff94845e79182f SHA-256: 460bb624f810f364ef2aadf72498ee358f74f6f7e4e9bd53d74a99a072bc5fbb
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 0.9996

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://druttle.ru/123?utm_term=creo+parametric+5.+0+advanced+tutorial+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd93c00b46f4.pdfIn PDF document text
    • https://kojoridenifuzav.weebly.com/uploads/1/3/1/4/131406931/3be8f5b61.pdfIn PDF document text
    • https://balupelirotapos.weebly.com/uploads/1/3/2/6/132681476/dinixe.pdfIn PDF document text
    • https://malekijewa.weebly.com/uploads/1/3/0/8/130813883/e488139c713c9b.pdfIn PDF document text
    • https://maviwodoke.weebly.com/uploads/1/3/1/6/131606431/9658276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_6054e28229496.pdfIn PDF document text
    • https://tixamipoku.weebly.com/uploads/1/3/4/7/134740597/8d5ec862758ecb0.pdfIn PDF document text
    • https://levoveto.weebly.com/uploads/1/3/4/8/134897684/514348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_605b7948cb163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_6013a0d444e9c.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/zowexazowosesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_600f07b9104ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5fc779f5db101.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/zogazejutuk.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/wotuxi_zatidugikuzo.pdfIn PDF document text
    • https://bivupiduxod.weebly.com/uploads/1/3/4/6/134664268/podozem.pdfIn PDF document text
    • https://derebadinexito.weebly.com/uploads/1/3/4/0/134012579/20c4834e49.pdfIn PDF document text
    • https://nagaxubonafebax.weebly.com/uploads/1/3/1/6/131606673/01d9e51cd62cb.pdfIn PDF document text
    • https://kadogejajufa.weebly.com/uploads/1/3/4/7/134717900/karulafozas-rijoleto.pdfIn PDF document text
    • https://visajemilami.weebly.com/uploads/1/3/4/2/134265887/tojojovaw.pdfIn PDF document text
    • https://jitavemalidev.weebly.com/uploads/1/3/1/8/131871699/699837.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_off0000cf77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF77 5384 bytes
SHA-256: 50f0b67eafbbd69b840c4e85b5c2e0156c5e446a6b892eaf9fbb51501f8f3e42
font_01_sfnt_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 10344 bytes
SHA-256: 08e76481da775985ce12c031bcbe2573cabc4af848cddd7931513bbe239d6e62

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