Malicious PDF — malware analysis report

Static analysis result for SHA-256 69833d127bcc1c53…

MALICIOUS

PDF

171.6 KB Created: 2021-03-20 18:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30c872ba8d0b6db8920993e482a00631 SHA-1: 1055701289ba03ed9d33c867bdc78548d8880be7 SHA-256: 69833d127bcc1c5304186365ec504c3d48bb49c6f3be4452e58f834495e929c2
126 Risk Score

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 0.9987

Heuristics 5

  • 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 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/strik?utm_term=samurai+clans+in+edo+period PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488855/normal_605351539ae0f.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/d57idZV/65464453374.pdfIn PDF document text
    • http://fodosokidorakig.22web.org/zorba_the_greek_dance_for_beginners.pdfIn PDF document text
    • http://vsedlyatebya.xyz/diversey_driving_range_covidir8w1.pdfIn PDF document text
    • http://want-seo.ru/kukajuvogiliknrry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_60505ff5575c1.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/jfF5ohb/ielts_speaking_questions_with_answers.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/what_is_a_good_vif_scorezef8n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420037/normal_5fcebd221e5d7.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/jfPzjic/38363918516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_60339fbad6d82.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/6hizmhk/palupimagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_60392c38d8376.pdfIn PDF document text
    • http://winoorama.website/60016457392wsm24.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/heEHDge/19351868381.pdfIn PDF document text
    • http://doriwev.iblogger.org/guparesugevumon.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/redegelesibif/altered_chords_piano.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_a6a7e6fd0b3048fe8c07c24c4ee7a9b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/all_cg_dj_song.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_13cd113e262c4d77a7aef0750cf0f305.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/free_template_word_curriculum_vitae.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/just_do_something_kevin_deyoung_audiobook.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/abbyy_transformer_2._0_serial_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F54 95516 bytes
SHA-256: 8648cd5a7e53bf20982e67d3f18f410b3c2b54e504cb8c47f9e30f42bc359ec0
font_01_sfnt_off000267d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267D6 5324 bytes
SHA-256: 44fb5b32d178141404b54e29010189b33e46a0a090f05a93649e5a97c1afd2d5
font_02_sfnt_off000279d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x279D7 11344 bytes
SHA-256: 6d09c9ba2c28d514cf29e31230565f87e9d33d8c906e1daa15c9a13c28aea9e8