Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f32017a188b085…

MALICIOUS

PDF

85.8 KB Created: 2021-03-12 10:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 558c67589495710143f0a5b19e290067 SHA-1: 9d062fc93f5eb141c592c058cdb93fd94457036e SHA-256: c9f32017a188b085c6e3cf1e5d415bda60d7054102a6071296d55c7c44db4e16
176 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. It uses a QR-code lure. 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-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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jacksth.ru/123?utm_term=chinese+dictionary+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410214/normal_60233ef3e456e.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/khjNgfp/80639936145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_5fcbc8a7e3df3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394068/normal_5ff5eed643c34.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/ojjjjaE/fire_boy_water_girl_ice_temple_miniclip.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/bhdZjfM/fall_guy_tv_show.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/giidjhS/53223559187.pdfIn PDF document text
    • http://vwwv-avito.online/notakaxetukakubuguvewebud8az9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490722/normal_60038925aa10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_6019d8b5b6258.pdfIn PDF document text
    • https://cdn.sqhk.co/naxisedomak/5nhTjgP/radio_xicotepec_92._7_fm_en_vivo.pdfIn PDF document text
    • http://wdd13.ru/novel_pramoedya_ananta_toer4occ6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_600c0019cfe45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_60362418ec679.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/fpAipjh/gepapifurupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_60347417925d4.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/fiam7je/vazowajifelefisa.pdfIn PDF document text
    • https://cdn.sqhk.co/xejarirep/a5HicRd/najetodibevukefizirif.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://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_710f0906be6d46a983cafeaad2bb34fa.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_4a22c80358654d41ae8da258043576fd.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 5124 bytes
SHA-256: 0f2ffeb5ad6fbbf034cd0e87b64e839d7bef9368d08b0009c852088d3d6ef589
font_01_sfnt_off000117b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 10712 bytes
SHA-256: fae39902721c44cdfcf095a990ba5f48440c3bd6d956d114e3799842d501c49e
font_02_sfnt_off00013bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.