Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d10b5532d41482…

MALICIOUS

PDF

43.2 KB Created: 2020-11-03 21:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 08a1c8e2508ab915ab4368a8e329c51f SHA-1: 69667f26b4dec28727ce35f7cced87ae61b889b3 SHA-256: c2d10b5532d41482329b7afd56ce0d3f0f494f48c9f881de8aca17d2536fbc25
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs, suggesting a lure to external content. The presence of numerous PDF links points towards a link farm or phishing attempt.

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://cctraff.ru/strik?keyword=quotes+from+twilight In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f91c6ff9e0e6.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/desikukinoviv.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/bubenudafir.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/2600911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f875921d42fe.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/8786000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dixaleko/gunezovoweronoro.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/islamic_calendar_months.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/morobamadavekikepotekakuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b98413-03d2-4a6f-a147-0a5d895bb881/devujorowomaxikotamome.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/43585178053.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/95097309155.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_off00006b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 5124 bytes
SHA-256: 4916958fb865d98392116060ce9dd331d0d5b63b6c67a5063c37b884025eea0e
font_01_sfnt_off00007c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 10484 bytes
SHA-256: 4d473ca4d0b393aa4671a8dea1a3668fe756bcc6c5b54004ee0822d719d8b15f

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