Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6806cac8ad0bcc…

MALICIOUS

PDF

69.2 KB Created: 2021-03-20 07:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3bfc6f25c9f75cf1945534b97d1bf760 SHA-1: 5c54331be72533ef03a1d773bd378cbc0ee19430 SHA-256: 8e6806cac8ad0bcc5d08669c896c7c5ada15f88d8e7c7d613aa3eef4a36e6056
186 Risk Score

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 0.9995

Heuristics 6

  • 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.
  • 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/123?utm_term=identifying+cause+and+effect+relationship+worksheet PDF link annotation
    • http://nuviteb.22web.org/26601001192.pdfIn PDF document text
    • http://pojekofa.iblogger.org/james_patterson_book_recommendations.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/851a7ffa.pdfIn PDF document text
    • http://vapawuruvoxo.22web.org/razufemagomoranuduwe.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/fuwukurilis_dowikawibij_luvaxulepu.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/723f0acedd6445e.pdfIn PDF document text
    • http://lonukadezejitiz.22web.org/toyota_motor_manufacturing_case_study.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/9da4ae4e-4e05-49fa-8d1b-1be30d12bb5f/determine_the_force_in_each_member_of_the_truss_shown_in_figure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0164a3c5-d45e-474b-a8c0-7020f088952c/gupanukokuzifoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2fa4961-c582-4715-9a14-eadbfff29d25/10027990202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4506ab19-d679-4bd2-99e1-2e1a66f4bdd8/delesakakosojize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2582ee-fc22-4dfb-8a36-ecd3c7231ca5/positive_thinking_exercises.pdfIn PDF document text
    • http://lebozid.epizy.com/51552655760.pdfIn PDF document text
    • http://faretiziko.rf.gd/fun_words_to_describe_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db2721b-e3e7-4ef7-a1a0-e9773e56bdcc/poxedifefaxoxowemogifafok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28273946-63bc-4c8b-b9c9-7dbda2807238/the_claiming_of_sleeping_beauty_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf51716e-a95c-4fbd-96b7-2a76a1cf5b41/79940604749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cc5c23-1514-40c2-8e7a-dfc7025b78de/how_to_calculate_instantaneous_velocity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66015323-b4e7-4acb-b4aa-360e00b340df/zugixasafelipiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d572cd2-3415-4208-afff-a0d2c5bcb52a/how_to_install_graco_4ever_all_in_one_car_seat_forward_facing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c516861-b51c-4d3b-9c32-e619f2e44ccc/eureka_the_boss_smart_vac_4870_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02aa8045-35d6-4ee4-8bb5-d198a7a05815/how_to_update_iphone_4s.pdfIn PDF document text
    • http://tezebidurob.epizy.com/81269832839.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_off0000cf86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF86 5612 bytes
SHA-256: a3ffaa5e29b439e697d1e3840392033a9ec864248cf497f17a4525b4b7013c6a
font_01_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 10136 bytes
SHA-256: 561cce5ee13d4af7d60ed6bf43e6959d73f1e015e98edf585a76a298bb0fb812