Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc3edfc350700f2…

MALICIOUS

PDF

68.1 KB Created: 2020-11-26 23:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6060c532cc7b41256e9fb99e35478c74 SHA-1: 803a2edeccae44eaa76b62beea5467517a4f5ff9 SHA-256: 6bc3edfc350700f2b16183d70ae9e6ed5c516a7419745e00a6a48f39203ab14c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, a technique often used in SEO link farms to distribute malicious content or redirect users to phishing sites. One of the primary external URIs, 'https://trafffi.ru/strik?utm_term=milk+and+honey+free+pdf+download', suggests a lure for free content, which is a common phishing tactic.

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=milk+and+honey+free+pdf+download PDF link annotation
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/besob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fa605c4e18eb.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/9698316.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/7ef482e735654.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/gojagativite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5fa1b74460213.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/zarelusipofox/original_bhagavad_gita_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/75938518660.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/onsets_and_rimes_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/33370582163.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/13794317733.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/ikariam_naval_battle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/7863395161.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/printable_funny_horse_jokes.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_off0000cd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 5216 bytes
SHA-256: ec57b026d7278a68c25ec61ec2e72f6334b8f4b47cf44b4ff52be56ad768ad95
font_01_sfnt_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 10592 bytes
SHA-256: d4b0e21e8d61661bc52c1e2695719162bbb7cae63c10be8d21615e4c56ed80ff

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