Malicious PDF — malware analysis report

Static analysis result for SHA-256 0170950495cdda12…

MALICIOUS

PDF

150.2 KB Created: 2021-03-22 09:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8b2d611fd1239df43e865fcc2a2cb85 SHA-1: 98a6438939c3ee821ab88f190d310dbdcf246dc2 SHA-256: 0170950495cdda12f81ba87fe95fafe19b0cde254a0879dda68288512288fc70
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://baarspo.ru/strik?utm_term=metal+gear+solid+2+substance PDF link annotation
    • https://cdn.sqhk.co/mopijiluxu/FgcuyEe/3526837287.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/goodman_gmvc96_installation_manual.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/kewutuxadadumebofodamizuf.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/loledeneziwezedivewim.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/75682175312.pdfIn PDF document text
    • https://cdn.sqhk.co/bodosuruwalu/iijcjbK/shotgun_vs_zombies_hacked_arcade_games.pdfIn PDF document text
    • http://natikolom.site/emulador_nintendo_64_apkp4wf3.pdfIn PDF document text
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/lifuf-xidubegu.pdfIn PDF document text
    • http://7gusevshop.space/kendo_mvc_grid_edit_popup_templatefim47.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/aman_movement_anti_ragging_form.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/vakoruketovususozovunewov.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/a8wSjbW/bumosi.pdfIn PDF document text
    • http://dkmz2.club/spatial_reasoning_testsdrwid.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/xunuv-vogul-davujitefola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_bb1d5734dbe24b9294a54e741a11ee50.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_9e1df394bf8e46dfb8a0bd050a9f7a9d.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_577987f203e446f6a5589de529c0af9a.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/what_are_48_laws_of_power.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_263d052b92ca4b7c90c807f5281d3c4c.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ca47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA47 15140 bytes
SHA-256: b9f425a55059551058ea208c540e561764ee16c60c12c35e1b5eada488698735
font_01_sfnt_off0001fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA3F 5384 bytes
SHA-256: 8e3e9ed444984b8f5ce9c8f2b220a666ac412364e9b95ad287838f088c0f0cf5
font_02_sfnt_off00020ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CA7 12148 bytes
SHA-256: 022a365d8c17ae4d0fbcc0332fd13598c1bf3fe32c500b3e8410b898c669bf60
font_03_sfnt_off000235a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235A3 16068 bytes
SHA-256: 11273ae8fae1fdd6f1ef685405aa24809e8907aa8ff7c84b2d15fc4bedf4a7f9

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