Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a4bc7cf00161294…

MALICIOUS

PDF

69.7 KB Created: 2020-12-24 06:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6476c05a148d0e21f779758fa550a7a4 SHA-1: 984bc974c22331bf6c8e61f9483b9b696dec5809 SHA-256: 6a4bc7cf0016129464381146f4dc4474b27ce3e33cf6c28d030eb944a7433211
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or redirection scheme to deliver malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this document is part of a phishing or malware distribution campaign.

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://traffking.ru/aws?utm_term=tee+ball+bat+guide PDF link annotation
    • https://cdn.sqhk.co/nebuneduzib/HhcheZW/kotetakiver.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/7448235.pdfIn PDF document text
    • https://kulirudezu.weebly.com/uploads/1/3/4/5/134583820/3fdf209afa5.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/9329271.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/lakex_medoxon_bepit_lebatexafovaki.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/hcPp2ig/xanonagulatituseka.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/5515325.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/3665384.pdfIn PDF document text
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/fifagigagefolaz-romurevikip-vilatuxekogeba.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/bsXiea6/circlix_draw_physics_puzzle_answer_key.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/5474692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab617a3-112b-4e62-af4b-2e1237717422/bamegoboredux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a6e8e3-8727-4062-a26c-86d7a4a4bf58/fuviropipotizovux.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/android_studio_install_in_ubuntu_14._04.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD685 4808 bytes
SHA-256: 23b936298365ba753f9ed2c437b8c94282cb6a56045e1ebb1d16c9f288ed9a44
font_01_sfnt_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 10212 bytes
SHA-256: 322f3c0098f442a625ebbb732b9962fbc1a6811ef6560de4d5f5d2d56e3efb8e