Malicious PDF — malware analysis report

Static analysis result for SHA-256 69aca3517c135ff5…

MALICIOUS

PDF

75.2 KB Created: 2021-03-01 19:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 87bb42ae83b053d15d4720364d050650 SHA-1: 5729f3e9dd78fb7f1718ca70a39fcde06a4f79e5 SHA-256: 69aca3517c135ff511e0b7df1747cc12769173f10dff99c3ed9233c3bf3cd496
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'fokemale.ru' which is likely a phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent to redirect users. No scripts were extracted, but the PDF structure and embedded URLs suggest an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=facebook+marketplace+cars+durban PDF link annotation
    • http://bedomukuruxe.22web.org/mac_os_high_sierra_hackintosh.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/tezifopidulopizasilab.pdfIn PDF document text
    • http://nudivupekol.22web.org/five_senses_worksheets_for_preschool.pdfIn PDF document text
    • http://tubujagowip.iblogger.org/pentateuco_pablo_hoff_descargar.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/ic_2300h_mods.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/evngdjh/77367686501.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/4HgfQha/44818769893.pdfIn PDF document text
    • http://jogubewuzamofet.iblogger.org/58448553768.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/gFTvHje/mutofepimetisageworabak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojidusajotat.epizy.com/ps2_emulator_android_games.pdfIn PDF document text
    • http://mowipube.epizy.com/watunibe.pdfIn PDF document text
    • http://mifisabewup.epizy.com/dka_treatment_guidelines.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/10450414740.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/11630742312.pdfIn PDF document text
    • http://vozefure.rf.gd/88149690224.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/avg_windows_vista.pdfIn PDF document text
    • http://tutedenomazul.epizy.com/ignou_date_sheet_by_enrollment_no.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/20662156785.pdfIn PDF document text
    • http://kitoxari.rf.gd/11238315953.pdfIn PDF document text
    • http://genenapukiral.epizy.com/amortization_in_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/74744875060.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_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 5380 bytes
SHA-256: 8b3ad4a95dc1385541199b9e866521ef953d87ed41ce5444921bad60592825bb
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 10760 bytes
SHA-256: 40f757bb9512a7d6c7efed0834f696148052b133cb2bab99d7163361a5dfb703

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