Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a5b91446bb2502…

MALICIOUS

PDF

68.1 KB Created: 2021-02-13 23:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0db6bdbe741146084043fa3bebe58a6e SHA-1: f899dc2dc9667f64efdcb3c2363701b349d654f9 SHA-256: 96a5b91446bb25021db652f2e2986068713ae9b784db218f35a6e41f1209bb36
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 0.9998

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://bologen.ru/wix?keyword=scotts+mini+broadcast+spreader+settings PDF link annotation
    • http://vseti.life/fatudavikoteranupumnwka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5fc9d6a393cd0.pdfIn PDF document text
    • http://yogist.fun/bosozikt207v.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jbgiF1k/robot_jump_over_hurdles_in_track.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5ff1d3c47e79f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5fdcf61390645.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/aifjahe/59211773404.pdfIn PDF document text
    • https://cdn.sqhk.co/momugutatok/hcbmyhi/detention_movie_2003_cast.pdfIn PDF document text
    • http://duperalenow.22web.org/resident_evil_5_full_movie_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ffe74cfaa9bd.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/ithdluw/colors_of_the_rainbow_song_signing_time.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/iecjgja/subadagopebigazirifew.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/1yiiOjg/8911534244.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/ijciiam/14150019695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovizaz.epizy.com/togux.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/69159323450.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/siforulotoka.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/65357275819.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/what_causes_coliform_in_well_water.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_off0000cd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD21 5604 bytes
SHA-256: 26d689698af397eaebd90c584b010633117ff62de296bac71fba75598f5471f8
font_01_sfnt_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 10308 bytes
SHA-256: 6a3af8cc693b3654eb47708925cc5097f42f032e0d3d68258b5e95b62b53a2ea

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