Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc692324f7bd187c…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 23:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7fd592df1f97a7332453edec595b9e8 SHA-1: d4d6449e73a66b214970656b04b63de0d980ced0 SHA-256: cc692324f7bd187c3947bb9929388355b4220fb3276aeeecacdb5e7eaf0addf2
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of many links suggests a link farm or a phishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/wix?keyword=tinkerbell+toddler+bed+set
    • http://zulesaxeririv.sportsontheweb.net/oscilloscope_guide.pdf
    • https://cdn.sqhk.co/nodujugebi/uH4hcfz/jozupuwogezolarobitumivi.pdf
    • http://tareworig.mywebcommunity.org/guia_ceneval_contaduria_contestada.pdf
    • http://wipunemobak.mygamesonline.org/agatha_christie_books_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4490949/normal_5fe8f7273c81c.pdf
    • http://wozilimesiz.mypressonline.com/charles_bukowski_post_office_free.pdf
    • https://cdn-cms.f-static.net/uploads/4529281/normal_603ae8f82c08c.pdf
    • http://bivaxosufuxibo.mygamesonline.org/how_to_convert_imovie_trailer_to_project_on_ipad.pdf
    • https://cdn.sqhk.co/xolanikipiz/hgfDogj/can_you_escape_the_room_11_level_46.pdf
    • http://xifadezuzurap.medianewsonline.com/96908508319.pdf
    • https://static.s123-cdn-static.com/uploads/4366024/normal_5fe2377876f89.pdf
    • http://rexevivejegox.scienceontheweb.net/newtons_first_law_of_motion_defines_force.pdf
    • https://cdn.sqhk.co/karapazepot/gejbDQy/nomeradurotafevemuxupe.pdf
    • http://zofunubesosena.mypressonline.com/tinupulewolafatoriki.pdf
    • https://cdn-cms.f-static.net/uploads/4378619/normal_60185104118fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/47ffce15-dbd0-42cf-a1f2-b717fe28013d/66474976963.pdf
    • https://uploads.strikinglycdn.com/files/f3a0144e-6a80-4d3c-85a2-0431351d72ee/oscar_wao_chapter_1_summary.pdf
    • http://dufeniwa.rf.gd/baroda_mutual_fund_annual_report.pdf
    • http://tewojaxosu.rf.gd/most_emotional_love_story_movie_bollywood.pdf
    • https://uploads.strikinglycdn.com/files/be4f58e9-b653-4b29-bda5-5705238c55be/xudejivi.pdf
    • https://uploads.strikinglycdn.com/files/1f7e668f-c13c-42c0-a16e-6a6d4ef705ce/cuisinart_grind__brew_12-cup_coffee_maker_dgb625bc.pdf
    • http://nowuvopejolek.rf.gd/bible_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1af.bin
c890d363850a28bade82a48e41418443161c38519f9e63078883444960a5c79c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 4552 bytes
font_01_sfnt_off00010119.bin
7d2564f235b36f13cd75e8cfeb133bfeb2dff96597f1678f691de8b95999b653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 11300 bytes
font_02_sfnt_off000127b5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B5 4324 bytes

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