Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d1d7e5ece41f9b…

MALICIOUS

PDF

72.6 KB Created: 2021-06-01 14:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a22b68cbab4996a55baf4bfd99dff3a0 SHA-1: a4a439b32dde8daa79063809b52394461aa11bc8 SHA-256: 00d1d7e5ece41f9b27ccfc6d43b1f94bbc8925d6a0eda9b818259bd53f708191
186 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 0.9998

Heuristics 6

  • 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.
  • 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://krisoc.ru/pbw?utm_term=blockman+go+cheat+mod+apk PDF link annotation
    • https://torimavilok.weebly.com/uploads/1/3/5/9/135984964/580de.pdfIn PDF document text
    • https://xidibifolun.weebly.com/uploads/1/3/2/7/132710634/9150452.pdfIn PDF document text
    • https://jasesinokez.weebly.com/uploads/1/3/1/1/131164090/kuwiditerikozu.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/a2cf61f8-dcda-4522-b423-efab8b42a5e6/is_the_boss_gt_100_worth_it.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/property_management_agreement_form.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/xuwinifonugis.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413553/how_to_prepare_income_and_expenditure_account_and_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3627e9d4-7f72-4100-891f-8997e5d5c179/lsu_football_workout_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e22141-2395-452d-a815-d327c741b43d/80920763673.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/16746039963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4002dda6-9973-4ed1-91ba-b1dae3cf0cb0/love_poems_for_wife_at_christmas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425f2d6e-6c23-4dad-88f7-5235c023e303/bissell_power_steamer_powerbrush_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e9b25c-38a5-4603-af0d-6474c018c1c7/xidakajixoz.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144428598/xujoxalutisalamul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6723c231-c744-4307-a1c2-de6f405f864b/how_to_teach_life_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f0a255-37e5-466a-8330-5f1c22336bd6/what_are_good_character_strengths.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/apache_max_log_file_size.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144427224/what_is_academy_sports_return_policy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fafa25-9c75-4cf7-bb7d-03368ba72f99/83138887178.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_off0000e260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE260 5324 bytes
SHA-256: ba44cd173fe41f3c89b8d494c2bdd8b33dd97d073b61dfe5a5a0b55e8a795eb5
font_01_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 9532 bytes
SHA-256: 150f25fd2ef08ebe27234dfb8fa84c3bda1f9018c50a307fae4ce685641a99ee

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