Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96bd3a2269f38f6…

MALICIOUS

PDF

80.6 KB Created: 2020-11-20 19:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 07997ebb3795034400eeaa33427dabc3 SHA-1: 151b0a9e55e90deb038088544762d43f1fa61bc3 SHA-256: d96bd3a2269f38f60d67c064f72c30ba34f47ae66ab6cd435fd4396aa6e83818
186 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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?utm_term=dykes+to+watch+out+for+pdf PDF link annotation
    • https://matoxidatu.weebly.com/uploads/1/3/4/6/134602194/sesedepobaluvijopu.pdfIn PDF document text
    • https://taxepenobeg.weebly.com/uploads/1/3/4/3/134355702/faxepinenu_labato_xomomex.pdfIn PDF document text
    • https://refapolujagosax.weebly.com/uploads/1/3/4/8/134896756/12fb1e8af1ba.pdfIn PDF document text
    • https://loxufezikuwudi.weebly.com/uploads/1/3/4/6/134687227/9737233.pdfIn PDF document text
    • https://toriradusug.weebly.com/uploads/1/3/4/7/134744904/duvolifubef_musodidof.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/gufib_rapoladajavuluv_fifume_zoluvobik.pdfIn PDF document text
    • https://kuliwulakut.weebly.com/uploads/1/3/4/5/134523122/9923536.pdfIn PDF document text
    • https://mitiguranam.weebly.com/uploads/1/3/4/4/134456526/575ec0.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/09513005-5e41-40e2-98ae-6a1dd65b3c96/nimojuditozale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454cd766-5f8f-4a7f-a950-3e10fce81a30/rawefozinekex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de09679e-cfa3-4330-959d-264d444babd9/81483741163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279ba64d-242e-4081-9d0e-5ac251f1fad7/xuveje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202d0924-7ca0-410e-b3e8-024fcefae709/noxutovazugo.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_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 13184 bytes
SHA-256: a358f4c691201c37321fe3810529052df6e5d0c9a0f3eca22ca6ab9ea8a38904
font_01_sfnt_off0000fcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 5468 bytes
SHA-256: 761753f1db6a9ad1bbfcca56a5863668ddfa201eb8799d7b964c8eb8f8b5ea3d
font_02_sfnt_off00010fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAE 10204 bytes
SHA-256: 8240bea924d5f02772df1c008d23b5d20b31a7ba6b0f613f6fca9cae491f045d

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