Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ebfef9f251524e…

MALICIOUS

PDF

89.2 KB Created: 2021-03-30 03:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe07e7fd9edb0fa71f58b18c589a561f SHA-1: c98460eb546eb481fa8c05634a22057c180d489a SHA-256: 34ebfef9f251524ec24299c6ce2f0d6896a2fc2382f511597bab098c784ceca0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing operation. 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 malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=epson+artisan+1430+inkjet+printer+canada PDF link annotation
    • http://pusewuvi.medianewsonline.com/mpdf_page_break_inside_table.pdfIn PDF document text
    • http://tagoturuluro.medianewsonline.com/malayala_manorama_year_book_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/jfjhSjb/video_player_all_format_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/Hkiijgf/padogugisuxaru.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/iKicjaC/timejadusorubabufonal.pdfIn PDF document text
    • https://cdn.sqhk.co/tozerutiwezu/8FrghRj/color_label_solutions.pdfIn PDF document text
    • https://wofirifitobad.weebly.com/uploads/1/3/4/3/134310136/105836.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/Oh0jjRn/91237270955.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/OmEhjhe/jojijajitoxel.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/accuracy_and_precision_in_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/desiketomasu/gehcJih/hello_chat_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/jdihBDo/dj_loop_pads_2_apk.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/sword_art_online_games_worth_playing.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/1088804.pdfIn PDF document text
    • https://sesadawaroni.weebly.com/uploads/1/3/5/2/135295108/fugajifaridojo_xugakefujelizeb_gitixejab.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/tFIhho7/defense_zone_3_ultra_hd_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/mficjgG/epic_games_phone_number_in_usa.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/b32d212e-6686-4976-a461-7fdac8ed414d/dark_souls_ii_scholar_of_the_first_sin_ps4_review.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/vutefibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d65fb6-7505-4bc4-ac08-bbbd261f1d36/zibupikapaluse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d761b09-ad09-4310-8da5-1a8b2b6c6d24/doxaliwoliref.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_off00011ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA9 5580 bytes
SHA-256: c90546980a902fe72a39dbf1b9973cf68ad367cb1f31d737d798b9620c6488f2
font_01_sfnt_off000131c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C3 10928 bytes
SHA-256: 6bbbe849f033ae9d29e8581404d652b1cf73c25d043b9e729c70ff3700057907