Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef61159fbb6fc9b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-21 11:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ba0b015af310718326dab8d76c9e226 SHA-1: 17cd2f15516ef25beea1897adffc5ca461e60587 SHA-256: cef61159fbb6fc9b6eb54a7ac6dabf29157395d6e8c94c28aea73b6e989b96c4
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. It uses brand-impersonation credential phishing. 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 0.9991

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jafoxexaromomev.weebly.com/uploads/1/3/5/2/135296472/8f2c81cfa7de.pdf.
  • 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://lozipotod.ru/wix?keyword=to+kill+a+mockingbird+reading+guide+questions PDF link annotation
    • http://migerov.xyz/excel_format_cell_first_letter_capitaltw9de.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/o3thjjd/bivobisor.pdfIn PDF document text
    • http://changepass.online/outlander_drums_of_autumn_audiobook_freeprzpm.pdfIn PDF document text
    • https://jafoxexaromomev.weebly.com/uploads/1/3/5/2/135296472/8f2c81cfa7de.pdfIn PDF document text
    • https://rusajilema.weebly.com/uploads/1/3/4/8/134853265/xamalu.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/9270940.pdfIn PDF document text
    • https://cdn.sqhk.co/dulemokel/fgyjjge/retro_video_game_box_protectors.pdfIn PDF document text
    • http://4escam-bot.online/black_beauty_1994ay28q.pdfIn PDF document text
    • http://pearhaidhr.fun/what_breed_is_a_dapple_grey_horse6jshu.pdfIn PDF document text
    • http://mazers.fun/xanathars_guide_to_everything_5ervd1e.pdfIn PDF document text
    • http://juilopkiretlo.ru/dungeons_and_dragons_dice_roll_rulesq8a77.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/5Bjh8L7/super_dancer_2020_audition.pdfIn PDF document text
    • http://seedcraft.online/play_free_3d_bus_simulator_games_onlinexqwwc.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/fgIjchc/american_civil_war_photos_in_color.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/D9iagjb/75598527678.pdfIn PDF document text
    • https://bigutorojorat.weebly.com/uploads/1/3/4/3/134352314/37a76aeb4a2665.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/hcZgcjf/tickets_vatican_city_rome.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/hhiige2/51415095426.pdfIn PDF document text
    • http://bizbize-yeteriz.org/is_there_bench_press_in_crossfitb03h1.pdfIn PDF document text
    • http://fb-ig-copyright.com/nezijugenilifamajisevokozh1d7n.pdfIn PDF document text
    • http://flathead.us/80961738141qlv8x.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/511024.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/rozebofukixus/vusenofab.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/scholarship_interview_questions_and_sample_answers.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_off0000d8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B5 5536 bytes
SHA-256: a7d63c26fab853a1aee7c2f3eece37a6e93e48864436a2d4ecb4c621cc1609be
font_01_sfnt_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 10480 bytes
SHA-256: 9bc197b1839cb495de9dd55bbf941374e8c01fd61f4ec34c3673e6858d450214