Malicious PDF — malware analysis report

Static analysis result for SHA-256 037029bd45a70772…

MALICIOUS

PDF

99.6 KB Created: 2021-03-25 14:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: cb0fdb0e79ecd6ff5cf760c6fab4ca12 SHA-1: 25cb5645fed0232ecb88249bcf0b488d85f09419 SHA-256: 037029bd45a70772c59d57b1eb3fb62d10287e700d0d77f6b1b2c430f111d13c
134 Risk Score

Malware Insights

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

The PDF document contains a suspicious URL and is flagged by ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to privacy concerns ('Can cops see your snapchat messages'). The presence of numerous external URIs and a link farm heuristic indicates a likely attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=can+cops+see+your+snapchat+messages PDF link annotation
    • http://tubixiwuwura.iblogger.org/4426549627.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/78011193497.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/lamebuk.pdfIn PDF document text
    • http://fiwazurenorin.iblogger.org/44449055888.pdfIn PDF document text
    • http://wopizup.mypressonline.com/94165532294.pdfIn PDF document text
    • http://logekolumo.22web.org/42012043098.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/63148112761.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/nuwexubosidufimulasiviz.pdfIn PDF document text
    • http://fesalasan.mygamesonline.org/application_of_biomechanics_in_sports.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://venewimo.rf.gd/mokatemuleno.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_73bb0bc7081044e38e868d1360e1a2bd.pdf?index=trueIn PDF document text
    • http://namewel.rf.gd/certificat_de_cession_de_vhicule_2020.pdfIn PDF document text
    • http://pusobif.rf.gd/22832379891.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_514e2ee5c7e941ba953d4e1a585a6725.pdf?index=trueIn PDF document text
    • http://tidofudavok.rf.gd/1953787902.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_c0d1f55916484735b71bd4a163021e7c.pdf?index=trueIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_7f31285b3bc54d5ca44b660363b19a5d.pdf?index=trueIn PDF document text
    • http://vemusimovoxodan.rf.gd/apple_logo_white.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_2b0a722c74644ffb8eaa1b6f4825bad8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7eab11-e589-4e97-a663-66c00abcec08/hp_stream_11_laptop_11.6_intel_celeron_n4000_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f027fa53-22bf-4140-9324-a9f2bdf3eeff/pijamaxuguwikevedim.pdfIn PDF document text
    • http://nifopufu.epizy.com/bts_make_it_right_mp4.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_off000143a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A3 5324 bytes
SHA-256: d38764503cd21ef86f09ce1d6ff39a2896201ab4b8d9a8debf626c7d5c98d98d
font_01_sfnt_off00015598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15598 12596 bytes
SHA-256: 755cb74b127c582d06f148135023cfb635648812e8480508c5b513a584fe7b07

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