Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6abd2143c766fa3…

MALICIOUS

PDF

77.9 KB Created: 2021-03-09 13:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: db97e3bf54442218684896ec41387ea2 SHA-1: 16873021f5c79bee13fc015e3a6d125f5107183d SHA-256: e6abd2143c766fa3300339783acab2ab34ef935b59c61b8565b2e1cda4a48687
134 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting and contains a download button lure. The embedded URL `https://resalured.ru/123?utm_term=miracle+thunder+2.+89+crack+free` suggests a phishing or scam attempt related to software cracking. Although no scripts were explicitly extracted, the PDF structure and malicious indicators point towards an exploit or a phishing lure designed to download a secondary payload.

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://resalured.ru/123?utm_term=miracle+thunder+2.+89+crack+free PDF link annotation
    • https://cdn.sqhk.co/sotogademo/1PC3jj8/lymphoma_radiotherapy_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/gc4TYia/mapavujusepab.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/85956355739.pdfIn PDF document text
    • http://navelina.iblogger.org/what_is_one_of_the_six_steps_in_the_problem_solving_workshop_safe.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/41081422046.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/hiK1vgi/goxenutidalasefisizo.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/hlhjjir/volafaxofivigopab.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/anorexia_y_bulimia_psicologia.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/what_are_the_highest_paying_jobs_in_information_technology.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/25580184734.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/national_competency_based_teacher_standards_7_domain.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_8b0a4c53e33a452590b8935f9160cf52.pdf?index=trueIn PDF document text
    • https://e7c716eb-dbe2-47e6-ba66-22a9c09b3d16.filesusr.com/ugd/a58502_8d59778dcee34921a9716b08a30b53a9.pdf?index=trueIn PDF document text
    • http://najizomixa.rf.gd/82618971702.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/ascii_values_list.pdfIn PDF document text
    • http://besipopi.epizy.com/33392762645.pdfIn PDF document text
    • http://kimatun.epizy.com/35774096599.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_42e13ea51def4191bd1abe7daee4b0ae.pdf?index=trueIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_4e3be38bd3174851afec002bce61a134.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/digevarodenivel.pdfIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_eb0711adcbc5489793d0a25f520a2044.pdf?index=trueIn PDF document text
    • http://biburusig.myartsonline.com/used_fishman_sa220_for_sale.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_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 5516 bytes
SHA-256: 3137dabf83500f447f2a0e61ca8b2de5c89d9d989daeb45acde8603b17f0fa97
font_01_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 11176 bytes
SHA-256: 7520b00849edadce9f93770492718b0e3a1ec743c31382b8e1408d8ad24ca524