Malicious PDF — malware analysis report

Static analysis result for SHA-256 599c084b74ff7c95…

MALICIOUS

PDF

73.1 KB Created: 2020-12-03 07:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fb89bc04d65f67db3c94cb8683f0ee0d SHA-1: d45b40de45aed1e1703846ed1dc6eca7f2ad5912 SHA-256: 599c084b74ff7c95662175fa34dcead3755484609343b0f4dc123298472b9340
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://trafffe.ru/123?utm_term=fundamentos+tecnicos+del+voleibol+resumen PDF link annotation
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/puzamef-nuxijarobiwara.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/3278274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_5fb9940b0d1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f988f2db31f5.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/fanume-fegevemiromej.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/wozudakoxetopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fc81b6a60df0.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/mikapixobofo_rovokimifudi_memiw.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/51966.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0e079ee0f32b871b34f7/1606290951605/92398808047.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112aed26ff1194f74a888/t/5fc150d008845d0924bb7365/1606504656969/dbd_dance_with_me_quick_and_quiet.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_off0000d0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CE 5124 bytes
SHA-256: d918f3442dba15087ea8f63ae21363c1daaa33baedd24b8fd30d69cfff3a7edc
font_01_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 12276 bytes
SHA-256: e063721a3dcdbecaa43e36db3fbd2d1630229bc4027f52144fe3452c7540ecb0
font_02_sfnt_off000109e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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