Malicious PDF — malware analysis report

Static analysis result for SHA-256 013c7c5c24c20a5e…

MALICIOUS

PDF

69.3 KB Created: 2020-11-24 17:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 491102ea9aa26aecbed6c92d2359191e SHA-1: 6be696e6cec5290a7770d5acc2fe1d5210d13a21 SHA-256: 013c7c5c24c20a5e079ae41a0b244fd8ee3745b3dd48a5ec499cecb07df2ee63
156 Risk Score

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 PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to phishing sites. The primary URL observed is trafftec.ru, which is part of this link farm.

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://trafftec.ru/strik?utm_term=the+game+chicken+foot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fa1a9ef3df80.pdfIn PDF document text
    • https://pokezivakizame.weebly.com/uploads/1/3/4/6/134619377/4500241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fa5bb772d8ff.pdfIn PDF document text
    • https://pelofaneb.weebly.com/uploads/1/3/4/2/134235527/21db79d3783f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5fa2e8098499b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_5faf11965e6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8dcb399e3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5f98dcc385f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fa37b1a52517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f90f604d114f.pdfIn PDF document text
    • https://pifeposanitu.weebly.com/uploads/1/3/4/7/134753567/728ddaa28abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_5fb45c933a42a.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/7a026e2d-3533-4692-a1f4-ca74ac6ccda0/taximugofaziwiviridodile.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/vabonutikugedabipuligodef.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_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 5000 bytes
SHA-256: 618b2065ad483d9185fac29eac7e2e3f94837fdebd49bc6bcdc59ee783b718a7
font_01_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 10144 bytes
SHA-256: 34aa49313cd241ae0bd804af710b64a63109400dc329f24db972cb6989f1eb77

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