Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fc0b9f3bd327e6…

MALICIOUS

PDF

72.7 KB Created: 2021-04-29 14:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1948ccccb61b4943a4b8088d76a5fd44 SHA-1: 26fbcf26f0e1f7075ea6418efd608cfdea459558 SHA-256: a1fc0b9f3bd327e6ccdcc98106cd637074542f1ed6aeab645e191eb1fb2a44c4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=strikemaster+mora+hand+ice+auger+replacement+blades PDF link annotation
    • https://cdn.sqhk.co/gozolosew/icgjQBx/pikugawumebomoxisa.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/dodonaperozerefilixu.pdfIn PDF document text
    • http://felesatediz.medianewsonline.com/hs_mini_maxx_update_2020.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/10897184647.pdfIn PDF document text
    • http://mebotus.mypressonline.com/27992529788.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/narnia_the_horse_and_his_boy.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/5557912929.pdfIn PDF document text
    • http://retoxen.mypressonline.com/1005325309.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/StieUTQ/jiomeet_app_download_for_windows.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/duvulejufuvijinowibeli.pdfIn PDF document text
    • https://cdn.sqhk.co/nafusomo/jd6PNic/8535769501.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/2ggic7D/gijuvikodugozo.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/dukonoxeg.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/bZ3hct4/901447067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/zowisofuxipivu.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/wodut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee7cbc9-5ce7-4139-b35d-caa56fe2e37e/jotufavuduvijuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b536df-3e7c-49f2-9a82-2c5d349f9bb6/why_does_my_lawn_mower_stall_when_i_engage_the_blades.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/best_performances_by_child_actors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24be2b06-d176-43ca-a555-3754470e31b8/short_easy_moral_stories_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/total_gym_xls_vs_total_gym_fit.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/20516544725.pdfIn PDF document text
    • http://felugibesixe.onlinewebshop.net/jufojijagagujudifobenonuz.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_off0000dbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 5796 bytes
SHA-256: a877baa1bc89d86db50a3fcfe3fd97f65564aab44b38730c6dc609dced9fa59f
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 10956 bytes
SHA-256: b87ce11a8a53efeb2284b735256cbdc4c38868735adbc5c0dbee855c213f96c6

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