Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69488112fcf6f8a…

MALICIOUS

PDF

79.7 KB Created: 2021-04-16 18:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 56337b707f03976175efb35d82a851b1 SHA-1: f58ea81c526cdbeb2b4efea511b127f0b0f4abb1 SHA-256: c69488112fcf6f8a5792fccf153eb0fb4a57c27b2007f640a11d3a8cf8c7bdfd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are associated with link farms and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=candidate+elimination+algorithm+in+machine+learning+geeksforgeeks PDF link annotation
    • http://lazategomid.scienceontheweb.net/how_much_is_hp_pavilion_15.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/ramotogarunasitozoxok.pdfIn PDF document text
    • http://trastenmyqort.online/zuwoxizomunijudapidi0r8s2.pdfIn PDF document text
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/zomolimoporozebopa.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/kagezativujutam.pdfIn PDF document text
    • http://presente-top.store/56414327724ongup.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/abkari_act_kerala.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/sewigadogazoriio9ir.pdfIn PDF document text
    • http://arevakar-travel.com/the_wind_in_the_willows_1995_moviebf15e.pdfIn PDF document text
    • http://reweder.site/azure_machine_learning_models_cheat_sheeteoy9h.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/aprender_a_tocar_guitarra_facil.pdfIn PDF document text
    • http://zootime.store/how_much_do_airmen_get_paidxcvk0.pdfIn PDF document text
    • http://4d-5d.com/23715863522z3fi5.pdfIn PDF document text
    • http://septiki-rf.website/duronenaboxijafigorozbbnj.pdfIn PDF document text
    • http://sexedate69.site/sajafofuluduwuvar56bmi.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/wabarapul_mabivi_zixulezokijumo.pdfIn PDF document text
    • http://copyrightreports.com/insert_a_gif_into3nbed.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/debate_examples_for_students.pdfIn PDF document text
    • http://7lessons.site/575519028912alqk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegigija.atwebpages.com/50013659739.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/critica_de_la_modernidad_alain_touraine.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_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 5404 bytes
SHA-256: c1ee22aabfe1387cf5fa9ac0e126a8e540c046aa18c634b3d380b901b05ab9f7
font_01_sfnt_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 11544 bytes
SHA-256: 161371fa3072c9d041e1158fd0e12355db0503980a75b048034f1ba5a35d2726

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