Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd54a18ae90d3d1…

MALICIOUS

PDF

48.8 KB Created: 2020-11-07 13:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 38e0dd8043d3b776af78b8eeecb30527 SHA-1: 2851a650d22cc6151b34ab439b50a15a190fea93 SHA-256: 7cd54a18ae90d3d11337a56063cd24b97e872f312b4365edd47db5c7ad3f7336
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/123?keyword=can+you+join+the+mafia PDF link annotation
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/rawexupeladujefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f9b51289bf8a.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/bojugoweparux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f980bbc2bbbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f90d821c1fdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f8d4c4719a8d.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/popujopid-sijogojolofof-gofewiwes-popuvaxexodazu.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/552a91b0867dd.pdfIn PDF document text
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/pidapegep-fagikew-nipexo.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.pdfIn PDF document text
    • https://rajivuwos.weebly.com/uploads/1/3/4/3/134398668/6430934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pezujajugaxu.files.wordpress.com/2020/11/73842690008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc91a4a6-8528-4781-b26d-eb10c2aa0b97/fix_it_felix_jr_rom.pdfIn PDF document text
    • https://kitobus.files.wordpress.com/2020/11/dafimugelid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 4784 bytes
SHA-256: bb26923ed72a80660052d53b50de2ee59b425c0a0f14be086204d439524c5ff2
font_01_sfnt_off00009086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9086 11144 bytes
SHA-256: 6b01f659727f3c0ccfd20d69b328ac9cd3ce5703937974db6ba9944160c84354

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