Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9d7a58c843c864…

MALICIOUS

PDF

46.2 KB Created: 2020-11-05 01:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f4b25467277fc61087705a19f64401a5 SHA-1: dc01e7172bdd8b739ee504fcd7f86a2c41a94e14 SHA-256: 0c9d7a58c843c864681549e651ade3714f6f06b582599cff79402973f17edc56
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, including one pointing to known malicious redirector infrastructure. The document body text and embedded URLs suggest a lure for pirated media, which is a common tactic for distributing malware. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to harmful sites.

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 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.
  • 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://gettraff.ru/strik?keyword=the+lion+king+free+hd+streaming+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f92a43373024.pdfIn PDF document text
    • https://gosasomaf.weebly.com/uploads/1/3/4/3/134370397/7c759cfc.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/8e9af831d.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/e6e3a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f8df50bba32e.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/d0b3ed56-60f6-4726-a8fc-38dfd4542645/bukafisunugobakafufoke.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/98085505286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4780a515-7758-48e0-a744-6d7eb3f22c7e/negolosofuganukigi.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/biological_buffer_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a945d9-6341-4dce-a054-46f059612247/57013797430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7322ad40-819a-4380-b706-0c201ea3d385/62616851735.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/game_theory_microeconomics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdfc9a0-9e35-4545-a150-09c330a13873/48315995486.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_off00007580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 5816 bytes
SHA-256: fca06e8c7e82233393a5f231e2015c8aaed5a1b55fe4fc594a915c94bb93af61
font_01_sfnt_off00008925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8925 10212 bytes
SHA-256: f7eab6110056cbd5f1fdaf623da060926be7ba45549c25d355b97213fdb969a3

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