Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d2f46ad2a14d07…

MALICIOUS

PDF

76.0 KB Created: 2021-04-01 00:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e190a13b8e164a3e35b19a17f111a52 SHA-1: f1ee9f39b71db00f11ba39cb5d8114464ec83d14 SHA-256: 65d2f46ad2a14d07d30c9a51a0df1722f925936aafe0b8986b9a09e31affb9f3
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install 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 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://lozipotod.ru/wix?keyword=baby+einstein+walker+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454546/normal_603b65eb2584b.pdfIn PDF document text
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/jimunejaxaga.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/jhb5gfm/best_warcraft_3_frozen_throne_tower_defense_maps.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/ib7iMib/98691523088.pdfIn PDF document text
    • https://lololitis.weebly.com/uploads/1/3/5/3/135346836/832851.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/kunujezof-pofaxetupuk.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/xafenenifobevos.pdfIn PDF document text
    • https://naxosetoj.weebly.com/uploads/1/3/0/7/130775404/9348553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_60604db04beab.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/1RfiFY3/xexetazogubigegidigobew.pdfIn PDF document text
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/dadaju.pdfIn PDF document text
    • https://cdn.sqhk.co/mevutaxisut/b3uwigl/lenovo_chromebook_duet_review_unreal_value.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/6199704.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/sazotig.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/gomakobez/automatic_control_systems_always_include_three_things_receptors_effectors_and.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/jifegaguziseborisititotob.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_dc261497a8cc43cba1d73bee2b21ed21.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_aaea39907d91409698df2b27e522eee1.pdf?index=trueIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_5379c459e20e4cf4966957b78b286768.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/40257501502.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_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 5276 bytes
SHA-256: e6c5f3b7c1a1bd37a3b623cc9242a67407a0de28bcdf7d0cfdf3e8d9a4d664ae
font_01_sfnt_off0000fda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 10948 bytes
SHA-256: daf2d6be608035f2b6265d00462014b5da416b26d7b15b703d62c5b2fbce9481