Malicious PDF — malware analysis report

Static analysis result for SHA-256 86aa8c0d7d5b61d2…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 09:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f44d62e2b0992dbf915d9ffbad886c30 SHA-1: fe504f86bfd3ba61bbb3caab3eca4630d248903e SHA-256: 86aa8c0d7d5b61d2c8a879fa424e63bc6a502d2d3d47135466498090fb64aa2a
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9662

Heuristics 4

  • 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
  • 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://xezojetit.ru/award?keyword=christian+premarital+counseling+workbook+pdf PDF link annotation
    • https://cdn.sqhk.co/vadafepagij/xiavQii/animal_characteristics_worksheets_for_second_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/jgif8XF/poached_egg_calories_nutrition.pdfIn PDF document text
    • http://pemutoguxo.66ghz.com/56182381010.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/jglkZcO/bmcc_email_admissions.pdfIn PDF document text
    • http://copyrighthelpcentral.com/in_cold_blood_test_questions_and_answers7kfg2.pdfIn PDF document text
    • http://thrivewebs.com/real_car_parking_simulator_car_driving_academy_games0aaws.pdfIn PDF document text
    • http://jatuligirez.22web.org/22925374056.pdfIn PDF document text
    • http://natorg.fun/mathematics_for_economists_questions_and_answersirom0.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/T32gihg/teneis_tiene_tilde.pdfIn PDF document text
    • http://fabermanufacture.ru/my_cousin_rachel_reviews_rotten_tomatoeswmfuu.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/747872fe-22c3-482b-8e60-a8d29d9a3ad9/american_harvest_snackmaster_dehydrator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cb7e92-dca9-4775-aea8-35b755841cee/is_mayonnaise_a_low_fodmap_food.pdfIn PDF document text
    • http://xuwarojuvewibi.rf.gd/neceros_pathfinder_character_sheet_fillable.pdfIn PDF document text
    • http://remurojax.rf.gd/writing_algorithms_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe1a6cce-83a4-4b20-9300-027386a331e7/business_communication_chapter_18_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8236632-a7f6-49c1-b81e-9d3be067ded1/war_storm_book_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36f38bc-8aff-444f-99d8-ae56894156ad/biwolex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a09d396-6732-4cf5-8d55-d11b54c69d4f/dark_souls_3_boss_weapon_matchmaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5572d19a-42a3-4ee5-bace-be0ab8438518/stephen_hawking_quotes_about_humanity.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 5768 bytes
SHA-256: d0aa0338dde4ebb82b8805c55705a86e788069ae20c63c65b27ef93dd617f29a

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