Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad01431b59dea559…

MALICIOUS

PDF

67.5 KB Created: 2021-01-15 18:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 64f9e4122891dc96ae078630368d4899 SHA-1: 43ef250377bed4e9e44395095550c112a69a6258 SHA-256: ad01431b59dea559bdb34c371453524535d78a1ea697bb683b28e54b20a7d003
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, many pointing to benign-looking documents, but also includes a link to 'traffine.ru' which is suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. ClamAV detected this as 'Pdf.Phishing.Trojan', and the ML classifier also flagged it as highly malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://traffine.ru/123?utm_term=geometric+probability+area+problems+worksheet PDF link annotation
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/3a49a2536a6e8a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fc86b449abf0.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/sepafoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5fa2525092e0b.pdfIn PDF document text
    • https://cdn.sqhk.co/morovujefi/gcRjjhc/65510309686.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/fgj2gge/jevipup.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/tifuwuw/avast_anti_theft_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/certificate_of_attendance_completion.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/gate_2018_physics_question_paper_with_solution.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/bundeswehr_dienstgrade_listenform.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/sobenopuko.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_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 5604 bytes
SHA-256: 450c740bb2c0560a73e5d78dda1f4922d0840c5bbfb20901159134fa93777486
font_01_sfnt_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 10724 bytes
SHA-256: c2e778b1120e5603e3ee09d49ff1650eb8a703d19c2d166e6c55f4e4b3913c04

Open this report in the interactive analyzer, or submit your own file for analysis.