Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ff8d9776fe000e…

MALICIOUS

PDF

64.2 KB Created: 2021-02-12 18:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 34638c97f1d4477bda98b09f3d972b73 SHA-1: 76b564c533c968c0a460621d087743502115c420 SHA-256: 12ff8d9776fe000e4551bd754a8114ff6920259b4c06e877165706ef2a6f8a78
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

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
  • 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 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.
  • 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://yafferge.ru/wix?keyword=super+mario+sunshine+rom+apk In PDF document text
    • http://serdyukov.pro/calendario_2020_con_festivos_colombiaz31y6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388814/normal_5ff2023137afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_6015eb7790e38.pdfIn PDF document text
    • http://flipping-car.online/xijewiwugkoboh.pdfIn PDF document text
    • http://albl.ru/the_rock_climbers_training_manual19qg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_600d2cc159dbb.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/cZijwgh/fps_strike_3d_free_online_shooting_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pupumukisev/4Y4uQgI/gefosifixig.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/1IjfiiM/launcher_ios_14_apk_luutinh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501484/normal_6006551b45755.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/aJggegd/live_stream_nba_finals_game.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/Tjfupij/90161880386.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/jdhdhiW/45949524889.pdfIn PDF document text
    • http://demask.fun/88844006847hz7eh.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/webulupekefaz0on2.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/R1JpA0b/suwakejufokudotel.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/J4ghjeL/penateligijexakirez.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_off0000bf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF97 5192 bytes
SHA-256: d19f358b60f2c2b931436e0b27e239df1190096808462d4c4ea4c50aa0363bd5
font_01_sfnt_off0000d10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10C 10128 bytes
SHA-256: 03cea3bf0894cbd1e627b066a206f90679a5827a196949523d5a700ad2f66582

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