Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb68e6210ec8c6e…

MALICIOUS

PDF

67.4 KB Created: 2020-11-24 03:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e5ba3af527e41c8f112f3ab5e2b694dc SHA-1: 4beeaf422e7a0d1902f7f9ca4d9af3db732e5a54 SHA-256: 9bb68e6210ec8c6e7ad1fdb5a3f6016ee77b8f2d05d42e03d99ea41926e5a0da
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. One prominent URL, 'https://trafffe.ru/strik?utm_term=gta+5+psp+game+free+download', suggests a lure for a game download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=gta+5+psp+game+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5f9bdcafdeae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_5fa4658dc2bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f87877b1cd7a.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/jewedexazedewexog.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/2329354.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/2385621.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/1ffdc0f4-9915-45f4-bf13-ac4c065b4864/bizawarewuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92178261-922a-4b5d-8ad1-e07c8ec8db44/95945741984.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/92776337982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd3d693-3064-4ba8-ad9c-d63ea81a4002/icd_10_code_for_symptomatic_anemia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8a317d-61b5-4ac2-857f-f38c170c4600/youtube_chorando_meme.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_off0000ca68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA68 5608 bytes
SHA-256: 9289038611e222d3083f128e29af351f140c88ad369d2c30939378fbb13afbf4
font_01_sfnt_off0000dd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7F 10272 bytes
SHA-256: 22672a4144063101063198923a12731667cd0bee350bbafe2dfcd12540e53c46

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