Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ba5cdeb5d08b8b…

MALICIOUS

PDF

76.3 KB Created: 2020-11-16 17:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb6c7e8733693dfc0f42e2bb991b64e5 SHA-1: bda4dafbf4ac0d9dd0e880d573719bcf2c4920e5 SHA-256: f5ba5cdeb5d08b8bcb7a36a91abca765ceca5d9730d5ab3d00e226a1a02313cb
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'traffine.ru' and a query parameter suggesting a lure related to 'special segments in triangles worksheet'. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download further payloads.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=special+segments+in+triangles+worksheet+milliken+publishing+company+answers
    • https://jowewuxutezu.weebly.com/uploads/1/3/4/6/134632231/5991708.pdf
    • https://cdn-cms.f-static.net/uploads/4447265/normal_5faa8ad530999.pdf
    • https://zidajikivumab.weebly.com/uploads/1/3/4/6/134625594/bizos.pdf
    • https://tadasika.weebly.com/uploads/1/3/4/6/134653914/zolipegomasenoz_jaluvur_lezakevag_novotujigili.pdf
    • https://cdn-cms.f-static.net/uploads/4422877/normal_5f9dc06e858ba.pdf
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/morutafimoxemum-segaxupetaj-wegavaz-zipiweb.pdf
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5f9288c392315.pdf
    • https://jobozisibipiw.weebly.com/uploads/1/3/4/5/134581899/wifaxomiwisafok.pdf
    • https://cdn-cms.f-static.net/uploads/4492593/normal_5faf0d804f3d8.pdf
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/zolawupipibawosu.pdf
    • https://mifuvepezomiluf.weebly.com/uploads/1/3/4/3/134312517/xadelawimufero-nitakowekirun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gitipelut/hack_cash_app_no_human_verification.pdf
    • https://s3.amazonaws.com/wefadep/31568941787.pdf
    • https://s3.amazonaws.com/vukumesoj/varicocele_sintomas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea76.bin
c6ef16cc6d3c71aabb0e67af9cf50a85a21a0421c08968a8ef151be5781a71a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 5848 bytes
font_01_sfnt_off0000fe47.bin
b20bda13ba1620f3f76681f3add76452cf4a4f599e0fa5cb7ab5763e6f2b2924		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE47 10928 bytes

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