Malicious PDF — malware analysis report

Static analysis result for SHA-256 b164433276216838…

MALICIOUS

PDF

73.1 KB Created: 2021-01-09 14:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 5d79bcc5f57955364ea5aec5c2545a4f SHA-1: 3138bc76db3fa5a4e316ceb745485b623a48c854 SHA-256: b1644332762168385de43fbc85f7e3da843902dd7668b0488f62554eb00e2310
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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.
  • 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://traffset.ru/mozel?keyword=%25D0%25BC%25D0%25B8%25D0%25BD%25D0%25B8-+%25D0%25B8%25D0%25B3%25D1%2580%25D1%258B+%25D0%25B8+%25D0%25BB%25D1%2583%25D1%2587%25D1%2588%25D0%25B8%25D0%25B5+%25D0%25B0%25D1%2580%25D0%25BA%25D0%25B0%25D0%25B4%25D1%258B+%25D0%25B8%25D0%25B3%25D1%2580%25D0%25BE%25D1%2583%25D1%2582%25D0%25BA%25D0%25B0+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C PDF link annotation
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/eeb6f.pdfIn PDF document text
    • https://bokorakalawu.weebly.com/uploads/1/3/4/6/134643693/jegaduvodatado_pemadiwikogafem.pdfIn PDF document text
    • https://gatikewud.weebly.com/uploads/1/3/4/3/134382011/46287e.pdfIn PDF document text
    • https://gukofatupov.weebly.com/uploads/1/3/1/0/131070505/733ab9d.pdfIn PDF document text
    • https://pufinixebajev.weebly.com/uploads/1/3/0/8/130873949/8641651.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/rigowakavenafog_ruluxokegoniz_vedebuxukawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427076/normal_5ff8f3b530efd.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/budulavuxagi.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/63a96419-a372-4530-92a9-fabca2eb5aac/49671550255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99dda625-af1c-40d4-a1d7-d04453337bb6/17859634372.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_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 5816 bytes
SHA-256: b8193e610ed7ec461fbc543db067695bb2a1fbfd82dbd3a89d919db799c65613
font_01_sfnt_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 15180 bytes
SHA-256: 2c835b922d469ffde27a35ff833c97fe4c68e21dffa320b40ab9590a416e4b0c

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