Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bfcfd95a63d169…

MALICIOUS

PDF

79.7 KB Created: 2021-05-19 17:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a66ca4e6ecbcc7eb323e3f754a6d8d6b SHA-1: 5313b5bb2172d06270da3cbe9a5e53b579c53ede SHA-256: b6bfcfd95a63d169c64cf7fe3c3c61620ffb2e85eb79699181327e95b8c2729a
156 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. 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 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.
  • 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://seumenha.ru/strik?utm_term=uber+roadshow+presentation+pdf PDF link annotation
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/d5dc947f8d29.pdfIn PDF document text
    • https://dikubone.weebly.com/uploads/1/3/4/6/134603537/vokogovuba.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/a4e93c23a4d27c6.pdfIn PDF document text
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/sojefatosugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bded1b2f-d725-4369-9992-7c557463989c/56810626844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a249f96b-c017-4a16-93f2-485b6e66a5de/serta_motion_essentials_2_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1812d78-906d-4d86-bcb9-784fec55c1e8/95118382861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3637f4fb-239b-41e7-963f-2d6667a01bab/kenmore_500_washer_stopped_working_full_of_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29bcbbff-9854-4df2-984f-e22cb04fe4af/basapofexutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac357862-fa25-4aac-a1ba-e5c77a217d65/xanisekive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cda8113-7a5d-446e-87f8-42861c2ef915/34841774068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cc4e1e-91de-4a7e-b99c-14b8465b48f5/stargirl_book_number_of_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd3d266-cc95-456d-9e36-510885e81d94/44993230775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca16fcf-6553-490b-af0f-26fd9a9697f2/wakam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb3250e-126c-4c48-8077-c40b8868c5ef/does_dna_have_nitrogenous_bases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76d1930-b6cd-4fbb-b0c4-3c82529f93b6/xafivikubosagebuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c890bd08-d90f-4c20-81f9-1c3a2f4b4a99/hair_salons_open_near_me_cheap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be77fb03-0f0b-480e-85e9-af2bccaa8551/how_much_older_is_damon_to_stefan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07320f1-9e6e-442b-8e9f-bfd528270390/dialectical_behavior_therapy_treating_borderline_personality_disorder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1200532-0d19-4324-be0e-641d6f70daeb/50720707188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035ec461-daa1-422a-893e-eba856583ca7/bakiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db4c84f-dadb-4c6c-98c3-d27cb4dcd418/e_wifi_gsm_alarm_system_app.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_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 5320 bytes
SHA-256: 3edce7e661a38df19b22514e9abd62377bdd40562f8d73a63c45f4accb4544fd
font_01_sfnt_off00010b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 10988 bytes
SHA-256: a2903e859183991c52a195381ffe86d1776a5dfd3f0d008032fe3067969e4562

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