Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7a3cd8b5b85671…

MALICIOUS

PDF

76.4 KB Created: 2020-11-17 23:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f8e11e95f8e8626b19f876f0c7cdbc51 SHA-1: ba992b6d91528578a8031dabe6dd3d7df16064dc SHA-256: fe7a3cd8b5b856713bd5bc6697ca4e5795900b06e21b3eabb513df6301d69fe0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. One of the primary external links, 'https://trafffi.ru/strik?utm_term=pillars+of+eternity+kana+build', appears to be a lure related to game builds, likely intended to direct users to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://trafffi.ru/strik?utm_term=pillars+of+eternity+kana+build PDF link annotation
    • https://zewujinewototi.weebly.com/uploads/1/3/4/7/134749630/wuwes_kitakigo_xigidokejuranig_wuvikoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fa4c5de6849c.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/4629086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f9c836bbe664.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/sulikinejomapaz.pdfIn PDF document text
    • https://rosuxixenazigi.weebly.com/uploads/1/3/4/6/134656419/roxinot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_5fa1a65d47b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f98b082077bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f99ab89574fd.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/sojebelevenex/lopika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415cd18b-8b61-42fd-8832-171840b3d502/lejixaxogitafefu.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/ninja_trader_manual_cz.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/ispoofer_pogo_ipa_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/2205110720.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/mopexokudupekojeso.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_off0000eef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 5208 bytes
SHA-256: 906e4adc282d121288c63021d7de69644e32a6c0e6a135ac7d9bc5d1fceed878
font_01_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 10672 bytes
SHA-256: 84476e18f9abd61e6981361f8295889886fb683d2c3a48570ea8cc11e921d02f

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