Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0d750930528998…

MALICIOUS

PDF

72.2 KB Created: 2021-02-10 19:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ed45d43185c5772a2c72003f96ba5bb6 SHA-1: 5472f6551ac768eb28034c10770e19cf86675ee7 SHA-256: de0d7509305289980dc2930c7ef9e3478a85380be29b4b7b4343c2b52e000434
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to link farms hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or spam campaign.

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 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://leonvi.ru/aws?utm_term=steam+s+slow+down+near+end PDF link annotation
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/9477318.pdfIn PDF document text
    • http://funseeds.site/86908662986vnd5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474720/normal_6005ed717e9b2.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/494460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_602299385aeaf.pdfIn PDF document text
    • https://peliwotamo.weebly.com/uploads/1/3/5/3/135325711/rebed.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/igpZjaW/knightscope_stock_forecast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_600df744d4071.pdfIn PDF document text
    • https://feroxetisilujux.weebly.com/uploads/1/3/1/4/131409167/5143943.pdfIn PDF document text
    • http://marafonsport.site/tumedonovipogepabiridipem5r1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bisiku/tikulibubaposutinabilasuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/3d_custom_anime_girl_creator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/jisazekaxoga.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D3 4908 bytes
SHA-256: 338e0712ac3b672bc792457f353ebc68fe4cb0600614cd5455bf3313d19f8cf6
font_01_sfnt_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 10804 bytes
SHA-256: 0547b950369c129bddc6190e52aef3aaf8b483ccb3e46c469aaa3a553cd5fa36
font_02_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f