Malicious PDF — malware analysis report

Static analysis result for SHA-256 193e7d325fbebf98…

MALICIOUS

PDF

69.5 KB Created: 2020-12-18 17:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f13d9b5b628b03958b29c5407a099b32 SHA-1: 7e2ee3396062c5d92083afdfde1f93e6ea4a7836 SHA-256: 193e7d325fbebf9818aa7640750b9be3142d3866dab1ad664aa05ff9a61e8641
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=magnolia+growing+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5fa3bae47dedf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_5fd6f29a0e6c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fccabb4bb9c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_5fbd98512feec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fbd655882ee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5f9ac9f6ac759.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/pilenapidokabi_mazosod_ferixejimada.pdfIn PDF document text
    • https://jewumuseporefi.weebly.com/uploads/1/3/4/5/134599703/6834861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fdbb7126637c.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/nafibanefexex/grit_angela_duckworth_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/giralut.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/ielts_academic_writing_skills.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_off0000d597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD597 4912 bytes
SHA-256: 5217d090d0e7a4af5ed53143686a0be34f36941325a42e3fa7f657a943a18885
font_01_sfnt_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 10096 bytes
SHA-256: 92b64aac46385eacd7121e969200d5ed95955575aac2584293662ee336b12b1c

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