Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce2337fb327c10a…

MALICIOUS

PDF

79.0 KB Created: 2021-03-24 07:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59f99f049dbd720baab40b015740b6c7 SHA-1: fe1948592123e3c4ccc9e5500a23f49ff4ada38b SHA-256: 7ce2337fb327c10afeb7d345ca54189f7c36d0886527406409409d1a9f82f43f
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 0.9998

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://mezovuduw.ru/wix?keyword=money+definition+middle+ages PDF link annotation
    • http://gadatoreneperil.mygamesonline.org/6416081044.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/dKhdha7/asteroids_atari_2600_online.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/03_yamaha_kodiak_400_4x4_value.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_602aba1ace1c3.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/iahgxgg/31956829195.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/85932184015.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/cggbvhd/zikonikugagu.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/biftONy/riborepinonar.pdfIn PDF document text
    • https://cdn.sqhk.co/dulunukosep/hcihjdF/betijuloxini.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/id9gcij/xenevaxu.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/suluse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_6002992907c58.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/mozoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_6026937431ce1.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/vinejivunitego/43435394971.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_5112c752fa3f448da784604a10e19685.pdf?index=trueIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_8912148033064044afb5213e29cfe97d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/81214140148.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 5240 bytes
SHA-256: 836c4f284789b26e7edb1461e388870135d650bdb6953a60303fb8b5d1c2b9bb
font_01_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 10552 bytes
SHA-256: 03dd2174c708ff5e564a989bdd0ab8c4191a28afd4cc0a6798ec17ccf41bb153

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