Malicious PDF — malware analysis report

Static analysis result for SHA-256 204d8f5292a51ea1…

MALICIOUS

PDF

67.4 KB Created: 2021-01-12 11:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 35ad61e26819afab9162936f8c921248 SHA-1: 9265b332933111a9e355ce15d5418cd6c35b7581 SHA-256: 204d8f5292a51ea18fab40f9036cf67fa024a7e58a5500ba964ca31d842ac3fd
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to disposable hosting services and link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the link farm heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=medina+show+choir+competition+2020 PDF link annotation
    • https://tawodigisiza.weebly.com/uploads/1/3/4/6/134665564/pegolositixu_serewekixixu_kadidodefolef.pdfIn PDF document text
    • https://site-1179882.mozfiles.com/files/1179882/barloworld_shares_khula_sizwe_application_form.pdfIn PDF document text
    • https://site-1196306.mozfiles.com/files/1196306/mountain_bike_helmets_reviews_uk.pdfIn PDF document text
    • https://sinonulu.weebly.com/uploads/1/3/4/6/134654736/bojaravi.pdfIn PDF document text
    • https://zirasave.weebly.com/uploads/1/3/4/0/134096010/2040685.pdfIn PDF document text
    • https://site-1177705.mozfiles.com/files/1177705/sujafasevusedela.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/nojejigaruvusobaxovefuko.pdfIn PDF document text
    • https://cdn.sqhk.co/senosekagoko/hjpjgjh/robot_helicopter_remote_control_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/fM3hjge/barcelona_dj_events_august_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/hfiajc3/vetunexiruvekewexe.pdfIn PDF document text
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/1118247.pdfIn PDF document text
    • https://site-1194807.mozfiles.com/files/1194807/70493794078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADC 5652 bytes
SHA-256: 36887fd76a9c0ae056a8d7506153c7c1a63e92a4b59154b1b799be74bd2d4c37
font_01_sfnt_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 10244 bytes
SHA-256: f730c5a4be514f243a14b5ffe963a05283d110f4e7ed726103ad0902295e6eb3

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