Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb41ceb12eff19a…

MALICIOUS

PDF

76.9 KB Created: 2021-03-08 22:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b83fb93fda0d67c69b0c819ef689882 SHA-1: 2da7f5ffbf929bb0dd25262b178f144503894000 SHA-256: edb41ceb12eff19a4a82669b5966bb6e7a9f03ee82bbac52f75c7e93b78b0fe6
134 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI references and a ML classifier flagging it as malicious. The presence of a 'download button' lure and numerous suspicious URLs, such as 'https://bologen.ru/wix?keyword=no+term+agreement' and 'http://sowoxapexemex.sportsontheweb.net/83116506311.pdf', strongly suggests a phishing or malware distribution attempt. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=no+term+agreement
    • http://sowoxapexemex.sportsontheweb.net/83116506311.pdf
    • http://copyrightreports.com/android_capture_back_button_pressbfw6d.pdf
    • http://yblda.fun/avatar_3d_blu_ray_1080p_freebnnef.pdf
    • http://zelumefepa.sportsontheweb.net/should_homework_be_given_to_students_debate.pdf
    • http://raisinsapp.club/329822350694tjo.pdf
    • http://ziwigosopijulal.mygamesonline.org/attack_on_titan_movie_part_1_review.pdf
    • http://pibarulajido.getenjoyment.net/are_wendys_fries_good_for_you.pdf
    • http://lotiruwibek.iblogger.org/2006_honda_odyssey_ex-l_problems.pdf
    • http://simopuvoramawu.mywebcommunity.org/preguntas_del_libro_sapo_y_sepo_son_amigos.pdf
    • http://bumasujofoj.getenjoyment.net/iphone_5s_instruction_manual.pdf
    • http://idealica-co.site/beethoven_sonata_e_major_op_109kf4l3.pdf
    • http://lovelyhouse.online/liwaforemebifefavadizjmn5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_f60c6f88b7f349b995fabb7de5a19b92.pdf?index=true
    • http://bidilud.rf.gd/antecedent_behavior_consequence_chart_form.pdf
    • http://wipidomi.rf.gd/bill_format_in_excel_free.pdf
    • http://bigapenegig.atwebpages.com/how_to_clean_the_ionic_pro_air_purifier.pdf
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_8a95292e65e848edb46c2ee9f6887ce8.pdf?index=true
    • http://maderenefozido.rf.gd/pisudumojidijapokik.pdf
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_4be7f83625364f45948026d758e11707.pdf?index=true
    • http://pozajuw.atwebpages.com/kosejanevusoz.pdf
    • http://roxujewov.myartsonline.com/apache_web_server_book.pdf
    • https://uploads.strikinglycdn.com/files/84561cd9-109b-4828-a855-55c2c9b85727/uppababy_vista_2020_strolleria.pdf
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_47b2000ad0ae4b4db900e823d89f1aba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d095200-e71a-4664-aa13-4cc76ab87962/96486095469.pdf
    • https://uploads.strikinglycdn.com/files/e44fb214-0c2f-4471-b37f-0e4fc569c5f4/64846808517.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f246.bin
3290ace59285748429238b35120426e345147cab08885075a2b3deeda436be70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF246 4764 bytes
font_01_sfnt_off00010265.bin
28bc9c6e122a6b8b8a583154c4609e4b3e62100104aaef6d423f8f333da469f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 10520 bytes

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