Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e65bdaeddd68898…

MALICIOUS

PDF

83.4 KB Created: 2021-03-18 05:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d134b334f18ec3aee77d0549bdcfb894 SHA-1: 826871e77356e958b4b11ed3f077c6d659061048 SHA-256: 5e65bdaeddd688982e95fab11c0bce050cb8b15ea371631fd2007bf8ebbcc8ca
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or phishing. The presence of embedded URLs and the PDF structure itself are indicative of a malicious document, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://vilenefex.ru/123?utm_term=wondershare+filmora+9+tutorial+pdf
    • https://cdn.sqhk.co/tusupuwadoda/SgjmVB9/pathogenic_microbes_list.pdf
    • https://cdn-cms.f-static.net/uploads/4404308/normal_60351ebc146e1.pdf
    • https://cdn-cms.f-static.net/uploads/4414849/normal_60317b29662fd.pdf
    • https://cdn.sqhk.co/gotakavapu/0je7Jhh/83365052144.pdf
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fed6488d39ad.pdf
    • http://all-gopro.com/classical_guitar_scales_exercisesqrpbg.pdf
    • http://andyhongdigital.com/damozogaxelefapoe7qm0.pdf
    • https://cdn-cms.f-static.net/uploads/4466172/normal_6015223cc1aea.pdf
    • http://adachivia.store/jepazijixuzafigf5ol5.pdf
    • https://cdn-cms.f-static.net/uploads/4373753/normal_60148411653e8.pdf
    • https://cdn.sqhk.co/raxinosi/iiIha8E/piggly_wiggly_sister_bay_store_hours.pdf
    • http://dhl-order.info/calculer_aire_d_un_triangle143ra.pdf
    • http://mx50off.pro/desene_animate_in_romana_bradul_de_c1x1ve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_adda7295e8a045ceb56eba2dc4016968.pdf?index=true
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_6f55986be62b4810a50240220adae15a.pdf?index=true
    • https://5f1c1209-45f6-45c0-988a-e0aaa04be055.filesusr.com/ugd/ba5820_be068c09c13241f4961019a59470f96b.pdf?index=true
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_d72fb91d6d204cb186dcf84c7b630f1d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/120d2443-411f-490c-b1e5-eace1236166d/96479321601.pdf
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_72c14dbe0d224f808a1dd423585cc2ac.pdf?index=true
    • https://s3.amazonaws.com/rivazixexuguri/finance_manager_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/jonora/why_do_my_motion_lights_stay_on.pdf
    • https://uploads.strikinglycdn.com/files/1983ac04-7838-4bf6-a00d-7f44cc782fe1/74604817940.pdf
    • https://uploads.strikinglycdn.com/files/ae103bd5-c7c6-4bbb-90ce-91081a556496/how_to_repair_grandfather_clock_movements.pdf
    • https://uploads.strikinglycdn.com/files/b4d9511e-50ef-482c-ab83-574d4ec9902b/88937116818.pdf
    • https://uploads.strikinglycdn.com/files/d0104757-049c-464d-bbce-d36808e16626/39432664364.pdf
    • https://s3.amazonaws.com/safenalavojuwu/xesadobopedat.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_off000107ec.bin
c50b6582a74ab8b85a3c3f6164a1b4d8bdc622ce85e55363ca68b0ae027ed150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 5452 bytes
font_01_sfnt_off00011a53.bin
2a99132729501d52c972a5c12dac31cc508ede15e693cdb10fdf84f39f7f7fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A53 10900 bytes

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