Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ef912bd18b4832…

MALICIOUS

PDF

78.2 KB Created: 2021-04-07 21:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f242bc48d4c0b3c37de91aaecf9ccd8a SHA-1: 4358d94989b974593924726d77a2f2da3603cad3 SHA-256: 64ef912bd18b483225f494f1a0239dddee59fc9be3de2b3ec76cbfa38046b3ac
134 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, forming a link farm designed to obscure the true destination. The document body, though heavily obfuscated, suggests a lure related to game cheats, likely to trick users into clicking through to a malicious download or exploit site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=marvel+contest+of+champions+cheats+no+human+verification PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484107/normal_600eaec31c34c.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/ge2hcji/cars_toon_tokyo_mater_korean_end_song.pdfIn PDF document text
    • https://molipexizeji.weebly.com/uploads/1/3/4/6/134693273/lebizutomobogotoxeb.pdfIn PDF document text
    • https://pisubemiduburor.weebly.com/uploads/1/3/1/3/131380627/181552.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/newIcG7/chogada_tara_ringtone_mp4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455178/normal_5fce9f0ede4e2.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/business_plan_samples_in_nigeria.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/master_book_of_candle_burning_page_66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475379/normal_60053e889c1a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_60601397a6599.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/31120719557.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374848/normal_6001a1d1031dc.pdfIn PDF document text
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/guxulatel_gezotiriwenago_tufez.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/gcMnjiX/london_brighton_car_run_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • https://wopixidotawus.weebly.com/uploads/1/3/4/5/134506387/rifudakako.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/159c1035-983b-43e4-b233-abc05ad7631a/how_to_reset_bmw_e90_service_engine_soon_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1767e2a-efd2-4e15-a21f-c855bed8a775/dujudoregolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1db80ea-8727-45f2-a6a8-c3b096c85310/la_biblia_hablada_mateo_5.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/12551607783.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/guided_access_not_working_iphone_11.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_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 5320 bytes
SHA-256: 9eaad579090260c86facb52a1b407f11d85ed077d5bd7c9c10e039988cf78e77
font_01_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 10932 bytes
SHA-256: 858096f4f6d71cbe07b7ebff11de4e7c4a45ff8ff4742f1d862905dd430101a7