Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f87742603e5a5a5…

MALICIOUS

PDF

78.4 KB Created: 2021-03-13 23:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7724be12a7d5b00c82bcb8aac86916f0 SHA-1: ae08fa53281305b38ac5464123e81682936ce52c SHA-256: 5f87742603e5a5a5fa424f520fa1480688f8769ad7a55f7d78c409e9c23faf31
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a phishing-related site disguised as a guide. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing lure, likely intended to lead to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+to+make+your+own+website+to+sell+things
    • http://nurokojo.mypressonline.com/9th_grade_math_problems_with_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4426270/normal_6042c823426b0.pdf
    • http://dosaxixapaxa.medianewsonline.com/13322336214.pdf
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5feba3c6372aa.pdf
    • http://kazexajisodibu.medianewsonline.com/diary_of_a_wimpy_kid_2020_new_book.pdf
    • http://pasiworuwiwoz.getenjoyment.net/joyce_meyer_battlefield_of_the_mind_bible_large_print.pdf
    • http://gafabotipunofu.mywebcommunity.org/autocad_free_trial_period.pdf
    • https://cdn-cms.f-static.net/uploads/4377931/normal_60309e160bdf9.pdf
    • http://sakulog.sportsontheweb.net/speedbit_video_accelerator_activation_code_keygen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/618fc747-076b-44fe-9d03-7310ed115e94/panirezaxonesitapinader.pdf
    • https://s3.amazonaws.com/bewibiwat/car_accident_report_letter_sample.pdf
    • https://f5071db7-799c-4807-8cfa-c66b012f33b1.filesusr.com/ugd/9a4546_4e0462f9e8d6448089c41f8e3cfe8966.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2851b949-3179-4cce-a659-a479bf976225/59133980834.pdf
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_45b55ce34b78480b8d54525a92bded50.pdf?index=true
    • http://sipanokule.onlinewebshop.net/thirteen_reasons_why_best_characters.pdf
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_de4117eaa6f54a9dae256e56bac89d3b.pdf?index=true
    • http://bodegifu.atwebpages.com/remington_pole_saw_repair_parts.pdf
    • https://s3.amazonaws.com/dazifozixawus/avery_label_templates_for_word_l7165.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31b.bin
9d9da2ab24c9fa052a4ecc1d15b615c54af8bd58b013589370381a9300e17509
pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 5456 bytes
font_01_sfnt_off00010591.bin
0e9b234d089a98720fef94a7dc59b9ea098e653add6828a9c99813ce55f84919
pdf-font-stream PDF embedded font (sfnt) at offset 0x10591 11448 bytes