Malicious PDF — malware analysis report

Static analysis result for SHA-256 38effd7d7d995a28…

MALICIOUS

PDF

39.3 KB Created: 2020-11-02 01:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 314ba3dae0ecf9cc3b3ba524e4dd4ab1 SHA-1: 20277e1c88762a3776f92c0e9d0b004d79d12499 SHA-256: 38effd7d7d995a28b213cf4713703cf36bea123965267cc81cbf8b8bd195f086
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.me/pify?keyword=the+answer+is+no+by+naguib+mahfouz+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5f967030b993f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f880f91a1826.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/mowidapixuj_wudazizowogawi_xujonasimitis_ruwelabopome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5f94711c9c9e4.pdfIn PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/c4708941970.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/temujilokiditu-repapusa-xetakid.pdfIn PDF document text
    • https://zewonawexekuke.weebly.com/uploads/1/3/4/3/134318694/witof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5f9ac79829b3b.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.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/6b296f96-0b89-4ec7-9961-96519f139b77/kalovaxipineso.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/second_world_war_history_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/stata_moving_sum_by_group.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/block_electronic_harassment.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/endocrine_system_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ecdf34-d2c3-49bd-abfc-156179994f14/10573739109.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_off00005714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5714 5756 bytes
SHA-256: 662d81292ecc00af5314175cc7cdce9f3c55851d74d27a28f54091ee327f32f6
font_01_sfnt_off00006aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 11764 bytes
SHA-256: 0408fd3a57d118b1e9c4b4527ee6bd5c065da53367fe7ff3ec1a58a73a2dd825