Malicious PDF — malware analysis report

Static analysis result for SHA-256 928ac63f992497aa…

MALICIOUS

PDF

85.3 KB Created: 2021-01-06 09:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d59880d78b5a137b01c70c8f716b91fd SHA-1: 52989117ae59eaff36f213df2f372b7e24916934 SHA-256: 928ac63f992497aa3dea3f31bc68a1a2bb7d8b99a32e7ef4e72e18e7ec195f8c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The PDF structure and embedded content suggest an attempt to disguise a malicious link as a datasheet, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=triac+bt136+datasheet PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc133c09-83b5-4e34-b83b-1bb8d280c381/calories_per_gram_of_cheetos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a49197-f35f-4280-9b5d-445d9b0434b8/kemipivegaruvosexolud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c8927e-41b5-49a5-9b61-883c1960d820/stephen_stills_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/kidigasef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c031b7-77af-47da-b82b-67fbfd889015/solving_systems_of_equations_graphically_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/pejitexara.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/volume_and_surface_area_of_cylinder_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887953f0-be11-4776-832e-ff91debcb243/8468390725.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/elemental_fury_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/wanojimebujujobolusurexam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8545320-e90b-4c86-a61c-2888331c688e/kavaninumirar.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/airtel_dongle_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/the_butterfly_effect_movie_in_tamil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 4324 bytes
SHA-256: fa0aeb64bf4798f92c0b26b67f5015e59daaa5854bd55c40a202d67784bd0b66
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 5456 bytes
SHA-256: 1f6e6f0675681e0825f23f50d90120127a7eeac55c599eaeabce4869c85335c5
font_02_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 13804 bytes
SHA-256: a3bfdd7074a6cf4d95b1c869e1da9ba660ea5809c0d48ef8f2b78a03de65b621

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