Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3670eb1a018744…

MALICIOUS

PDF

72.7 KB Created: 2020-12-26 16:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8e6161c005fa6707d1f5d3078b73908c SHA-1: edae5c81b74067e0a7914565b9ccdf02ebcc7b5e SHA-256: fc3670eb1a0187449563b54ae40507ad3b6fe6b6da21306ddcb02999994b6453
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/aws?utm_term=1-+300+fishing+guide+classic+wow In PDF document text
    • https://cdn.sqhk.co/lewivapawo/gKJ3he1/adv_screen_recorder_app.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/MgiIloi/nba_2k20_player_ratings_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/L3igjbm/metal_strike_war_gun_soldier_shooting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/giguCWz/70410164060.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/uAVjfje/79799142752.pdfIn PDF document text
    • https://cdn.sqhk.co/lirerafi/uiiOSYn/vr_karts_sprint_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/Cu1RAgi/supubefawazofesoduvuvapo.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/bgjaj7s/90767230068.pdfIn PDF document text
    • https://zukiferadisuxa.weebly.com/uploads/1/3/4/7/134774344/jazafumufedula.pdfIn PDF document text
    • https://dokipodaj.weebly.com/uploads/1/3/4/3/134306773/8430027.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/CIigcpn/98074299225.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/gjidfc1/1320575014.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/810491f8-163f-4872-9bcb-fd3897529826/sex_iran_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d03afa3-d7f6-4c5f-a501-6da60ca92081/haynes_manual_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a836dc2-563f-41b1-96cf-a74a63b82183/pagunimubapizoxor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2079df53-871d-4377-b90b-9a9628deef22/rawilofenefidigumofabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c396fc22-1858-423c-bbab-9579ee360de1/zatoli.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_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 5576 bytes
SHA-256: cd69dd40e0d868f7f55ffa8696651924f9da2d2be1eb5bd70c30d3dfbbafac01
font_01_sfnt_off0000f23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 10536 bytes
SHA-256: 7f18bde51577c2332d3682a7d5b30b9ff062b6e97b8237e0f1c9ddc3c6e7a5bd

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