Malicious PDF — malware analysis report

Static analysis result for SHA-256 828ed7080d4803e5…

MALICIOUS

PDF

70.5 KB Created: 2020-12-23 02:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5c36cdd8ba6286231d8a63399e8994da SHA-1: 51e185188aba43fc742f778b3ee3c5ca1c6c7640 SHA-256: 828ed7080d4803e585b799517b303f3f9e2843d2aa0adf37a3e2030bbfbc3618
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Cowboy gun duel game'. This indicates the file is likely part of a phishing campaign or a distribution mechanism for further malicious content, leveraging link farms to obscure the true destination.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=cowboy+gun+duel+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5fa8bba43588c.pdfIn PDF document text
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/5663485.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/01573d50.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/8290730.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/zobutokajapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8872cf09257bd6c6ae2/t/5fc8d277094cf7617dc9e3f4/1606996599241/sedadisakuderipupodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6920c546-d511-4d88-835b-6160a9db7e97/2166328033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a787ecad-d0fb-4104-86be-d66a84fa796b/terusopotisavuni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe1586a4fe611484053e035/t/5fe1ceb29b48ae3f967233ab/1608634035003/beatles_melhores_musicas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15e0c3dfdd95b60d85a11/t/5fd1d10b1693665fc7d2680b/1607586060697/feist_dog_black.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/samsung_galaxy_s9_plus_android_10_beta.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e107791da6493f66ed7c/t/5fc834ff8bd779356748a265/1606956290203/71596111692.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_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 5108 bytes
SHA-256: 7be213988ca2a166d10225e12bf666192888f6ce01a2955f9c7aa5251f2cc975
font_01_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 10864 bytes
SHA-256: 5e8b9075552dba0a1ffd731aa524a8b7bb48b91e1b0a7f42128eed9ee6810fc5

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