Malicious PDF — malware analysis report

Static analysis result for SHA-256 2313c1b7045bc9c9…

MALICIOUS

PDF

70.5 KB Created: 2021-04-13 14:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0cc92e8e214e89f5c63ea6d31bb94417 SHA-1: 48c135781777aef30f604245c0a231b9072618ff SHA-256: 2313c1b7045bc9c98fa7a1a51d18ca5d394417be1885f492ca5ae8d50c99940c
134 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with one pointing to 'soxebez.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious workflow designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=fluke+337+clamp+meter+user+manual PDF link annotation
    • https://cdn.sqhk.co/zifiguwosu/cjejgEg/50354814573.pdfIn PDF document text
    • http://epipog.com/campark_trail_camera_t40_manualpy5wp.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/traditional_and_authentic_assessment.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/how_to_change_the_code_on_a_supra_key_box.pdfIn PDF document text
    • https://cdn.sqhk.co/laxuweredex/ihcinhf/3969191841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_602e2976340ee.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/BAzhgVD/bubbles_drink_alcohol.pdfIn PDF document text
    • http://promooffer.site/tufonoolmot.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/g9dupgc/bajrangi_bhaijaan_video_songs_free_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_601f2b0f23ea6.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/dji9wid/download_drive_simulator_2016_lite_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecce5461-bedc-4f86-a976-c33ee0b63811/70477540680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5e91ca-f464-4975-83ae-c2836b0d6d5f/39726711113.pdfIn PDF document text
    • http://sidorigix.rf.gd/29392177843.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/samsung_galaxy_tab_4_sm-t337a_case.pdfIn PDF document text
    • http://lusalelafujijo.epizy.com/download_public_finance_textbook.pdfIn PDF document text
    • http://mamisiz.rf.gd/botujonodugogeromero.pdfIn PDF document text
    • http://jazipas.epizy.com/bomunetevukabaxosadanax.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_off0000d312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 5344 bytes
SHA-256: 80622f0f73d0f75850dc3e2a5fba2f182d62ae23b9d8a9ae4f2090b8a6619b82
font_01_sfnt_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 11944 bytes
SHA-256: e2d69537fac0d284496f7b6451e43c88057173a2fdf931183cc80b84b9e9c85c

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