Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaa752cbc127f7a…

MALICIOUS

PDF

69.1 KB Created: 2021-03-01 13:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 99a86c4e18740c28f1a77fdf27de56fb SHA-1: 07619df8e8bc7fd8d11d1a7085aa8a617e503a96 SHA-256: 7aaa752cbc127f7a352c9741f70c1630a0cef8c80409759c2b4f496645ed7e81
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to "Game of Thrones cookbook lemon cakes" and is associated with numerous embedded URLs, many hosted on disposable domains. These URLs likely serve as lures to phishing or malware distribution sites, consistent with a spearphishing attachment attack pattern.

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://dugedepap.ru/strik?utm_term=game+of+thrones+cookbook+lemon+cakes PDF link annotation
    • http://pumujavebedopa.iblogger.org/sorowenodepex.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/bamirekonumu.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/54980574730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_60048da5d60ae.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/hot_springs_spa_sovereign_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407789/normal_5ff7e05ce822a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471948/normal_603a29d03ed74.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/apc_550va_line_interactive_ups_surge.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/lagagasugipoxizajubevim.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/nowekitofukesobinebufex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485440/normal_600dfd8581107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_60331a3218687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povusesa.rf.gd/riddles_with_answers_and_tagalog_translation.pdfIn PDF document text
    • http://kutezowifemiwe.epizy.com/the_hunting_party_1971_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/2387031473.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/fofaz.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/how_to_train_your_dragon_book_4.pdfIn PDF document text
    • http://zeduneku.rf.gd/game_total_conquest_hack_offline_apk.pdfIn PDF document text
    • http://gidozowelixije.rf.gd/23326147913.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_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 5356 bytes
SHA-256: 235f7af50a7c2d58beb205e5ff0406ecb69d93c079e7bc0867b155058d405f57
font_01_sfnt_off0000e31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31A 10548 bytes
SHA-256: b8f09ae6f22e393f4db5580fd360483ef870ea351f2eaf0cb0915ebe040e71c4

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