Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9235f6d35b9612b…

MALICIOUS

PDF

69.4 KB Created: 2020-11-19 19:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e8eb6a176ad3ebf51b2631c868b4eeac SHA-1: d84f4a4af6d75d4240f988b50f220fc113de44a3 SHA-256: b9235f6d35b9612b9242d14c51d0126b530ced1d2f106894d1d2f845cdf3dad3
156 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 ClamAV and 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 0.9995

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=warm+fuzzies+story PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fa271f8c8680.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/4c2cb17da89382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5f970b192f3c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8bfa4b1c94b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fb00bb837e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f94c92c993c1.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/862ce14b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fb509e130064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f8a0588aad1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/bodyguard_malayalam_songs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FE 4820 bytes
SHA-256: 55a38f65de368709f601281f18930c6652e96351244a2f609b8b16db65c2ce89
font_01_sfnt_off0000d77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77E 10404 bytes
SHA-256: 057fa3fc88be541f1d0fdb038328ad7fc07a0c4f2d0630645ecfa8bf85183b11
font_02_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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