Malicious PDF — malware analysis report

Static analysis result for SHA-256 8784b5094e502605…

MALICIOUS

PDF

149.6 KB Created: 2021-04-03 08:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abdb7e88dd85f96c9d161ce2d66054a8 SHA-1: bd2be37ff8166fc664a5b4c3375497f744b19936 SHA-256: 8784b5094e502605df4b6226920d96c100dde7428ee71f21e04b5f57e548017d
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that redirects to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing or malware distribution attempt.

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://soxebez.ru/award?keyword=waiting+for+godot+pdf+book
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/resufunagulip-gutojilo.pdf
    • http://lizakoku.22web.org/tareekhi_books_urdu.pdf
    • http://tutavizukatafoz.22web.org/java_core_fundamentals.pdf
    • http://sevetoxagejip.iblogger.org/paperboy_audio_naa_songs.pdf
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5ff3f73666cff.pdf
    • https://cdn-cms.f-static.net/uploads/4369331/normal_60273c5c43557.pdf
    • https://cdn-cms.f-static.net/uploads/4481423/normal_602550502e203.pdf
    • https://sofubile.weebly.com/uploads/1/3/4/3/134380394/rufajogajuwutiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/901fdff3-364a-4f93-93d0-634273fefb07/iphone_6_plus_128gb_uk_used_price_in_nigeria.pdf
    • https://uploads.strikinglycdn.com/files/f54faba4-54b2-4a0e-af5a-c58e713ae871/sex_and_the_city_reboot_new_name.pdf
    • https://uploads.strikinglycdn.com/files/1ade2952-d21a-46e4-9e13-411a6b1aec45/24714822385.pdf
    • https://uploads.strikinglycdn.com/files/d1fd9bcc-0dab-47ce-baf6-a3ccc50d15fd/bixozorusi.pdf
    • https://s3.amazonaws.com/poguvelefa/informantes_claves_de_una_tesis.pdf
    • https://s3.amazonaws.com/kujapomib/measuring_units_worksheet_chemistry_answers.pdf
    • http://tuzoxizusuzu.epizy.com/aramark_uniforms_catalog.pdf
    • https://uploads.strikinglycdn.com/files/d51ca451-12fc-4e2e-b310-2d7330ca8989/vedexexu.pdf
    • https://uploads.strikinglycdn.com/files/9680e606-5c2f-4e38-994c-8885dc6d6ef1/fugl-meyer_assessment_upper_extremity.pdf
    • http://fewuzefar.rf.gd/tegurodokawata.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_off00020c4d.bin
1a0317275bd42762c23686120d1f12a7a84d46d8b75e4a0fe7004522f1345506
pdf-font-stream PDF embedded font (sfnt) at offset 0x20C4D 5216 bytes
font_01_sfnt_off00021e2f.bin
3a1920f0d0e019504d0db95b6699ad1fceabfc1632a151af7ebd6d4c11c925f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21E2F 14288 bytes