Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bc419a230e9047…

MALICIOUS

PDF

71.9 KB Created: 2021-03-22 03:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9790a7bf6b965f715fd07a00fd0d90f8 SHA-1: 4395bf3ce44e1d1551d0f6f32df7fe36c803c001 SHA-256: 40bc419a230e9047dc247dadebb38bc2544dfa2e82d5622574451394e65ea90f
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 0.9996

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://vilenefex.ru/wix?keyword=google+doodle+happy+wheels PDF link annotation
    • http://meetraisins.club/rulowojukztvr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496824/normal_5fd78894a8b09.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/gdjjjaL/grey_and_white_world_map_poster.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5fc6502146095.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/ijeXOVZ/74467942568.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/jfijVQV/best_hollywood_action_movies_to_watch_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_60291da2415f2.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/Igvigln/end_up_all_meanings.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479718/normal_5fdda251ca1ee.pdfIn PDF document text
    • http://fumigatoff.online/how_to_connect_bose_sounddock_10_bluetoothauvtr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_ae471a00446b427692206e6afa5873cf.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_d8390c92b124472a8d116e3c66a8bd12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goneduzum/verimimaxisapib.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/9248500804.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/lixufipiruxanazexipozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75b8569-c3f8-4f17-a41f-9dc3baf70e86/craftsman_edger_electric_starter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9d5ab9-6472-49cd-b11b-d340038eb7f7/online_logo_design_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/28968852701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0195a3e8-2488-4520-9f3f-b0a9ff59b60c/12979072153.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/59864864971.pdfIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_2d689eddb571422a8e81dc5bd03821b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/896dec2c-2bfa-4ce2-8571-bb285c308f5b/18346445188.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_off0000db2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2B 5348 bytes
SHA-256: 4a79c2ac8541d6cba4f4ac45d6f4e50590427ff03167abd141757f9feee53fc2
font_01_sfnt_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 10724 bytes
SHA-256: 285ce0a5a062131461f3fddaa141621ecb9e1b8bb1ec2bba3395e4e41dd4fae4

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