Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa5df795a6feb82…

MALICIOUS

PDF

78.5 KB Created: 2021-05-19 02:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9760c11f4bd8b21224a5bc0a414d0d8e SHA-1: e12d171991ee28c701f9733941044f6995e0b7ed SHA-256: bfa5df795a6feb825c3f34f32f5ea30ad451d17fd82fa46f9f3190f3f7fabe2d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'funny names for zoom calls' to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://golowaki.ru/strik?utm_term=funny+names+for+zoom+calls
    • https://cdn-cms.f-static.net/uploads/4391013/normal_6052d97397f9c.pdf
    • https://static.s123-cdn-static.com/uploads/4385647/normal_5fe4e6c225ded.pdf
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5ff2953f2869b.pdf
    • https://cdn-cms.f-static.net/uploads/4454286/normal_6017c552bba4f.pdf
    • https://cdn-cms.f-static.net/uploads/4457573/normal_606b6caa34e14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d22a6fb4-6342-468b-a9ed-36cf05c5b283/39753490511.pdf
    • https://s3.amazonaws.com/dogevazapiwediw/xajisamituvora.pdf
    • https://uploads.strikinglycdn.com/files/119ae24c-de87-40a9-9187-02bc05ade8f4/83624079696.pdf
    • https://uploads.strikinglycdn.com/files/2cf400e2-0d37-4248-8957-31b509284700/noguzob.pdf
    • https://s3.amazonaws.com/tedowafomaru/excel_holiday_planner_template_2019.pdf
    • https://uploads.strikinglycdn.com/files/0e13c355-c44a-4f4d-bd54-ada4acd51e9e/acts_prayer_printable_free.pdf
    • https://uploads.strikinglycdn.com/files/ed9df1dd-127a-4532-a7de-a8b0b570b732/what_are_the_characteristics_of_the_river_valley_civilizations.pdf
    • https://s3.amazonaws.com/gumegulaxi/permutations_and_combinations_quiz_with_answers.pdf
    • https://s3.amazonaws.com/vezumobigodub/why_is_australias_flora_and_fauna_unique.pdf
    • https://uploads.strikinglycdn.com/files/8103cbfd-31de-44b3-9aeb-2a136281676f/all_scripture_is_inspired_by_god_and_beneficial.pdf
    • https://s3.amazonaws.com/najubu/dupixavaguzofodalididugu.pdf
    • https://s3.amazonaws.com/bokelur/pebifirefoj.pdf
    • https://uploads.strikinglycdn.com/files/662aa740-ebc5-4509-99f6-d9cec510cca1/74603519523.pdf
    • https://uploads.strikinglycdn.com/files/204cb211-b228-4a03-8d10-9266213a7347/assistant_finance_manager_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/jipowumat/classic_wow_human_rogue_leveling_guide.pdf
    • https://uploads.strikinglycdn.com/files/a68e1d67-55f9-42a8-9840-fca0fd94cd40/python_tutorial_for_beginners_w3schools.pdf
    • https://uploads.strikinglycdn.com/files/b8de93ea-6beb-4f69-831f-3da964bd7aec/75088346272.pdf
    • https://uploads.strikinglycdn.com/files/41772371-ebf4-4f33-8d6c-aefd77447de9/transformational_and_transactional_leadership_styles_as_antecedents_of_safety_behaviours.pdf
    • https://uploads.strikinglycdn.com/files/5a009a13-3fa0-4be4-b834-31e00138dc47/52345139723.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea86.bin
f6cd9b643e529fbce1aa4d4c287d20362434b771a0b82cbe3465bb22edbd6b2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA86 4888 bytes
font_01_sfnt_off0000fb18.bin
d1dac4ab689f61a5d7d8e36711bdb57b0fb5a5b614159680146ee4426bf7292e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 10576 bytes
font_02_sfnt_off00011f45.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F45 4324 bytes