Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3afcee737a3f2a4…

MALICIOUS

PDF

88.7 KB Created: 2021-03-24 12:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3df5e37e7413d0f1e590bac193a6e9df SHA-1: e5fb796bb160d499a2baafc0a96cf43a05591e0e SHA-256: d3afcee737a3f2a40eabb40c96b63c71b4219f6c5c9061d5d2293d554280092a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with several pointing to disposable hosting and acting as a link farm, suggesting a phishing or redirection scheme. The PDF structure and embedded URLs are consistent with attempts to trick users into visiting malicious sites, potentially for credential harvesting or further payload delivery.

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://kuzutuzo.ru/award?keyword=les+autodafeurs+2+pdf+gratuit PDF link annotation
    • https://cdn.sqhk.co/kakapoxavu/hJjjjdW/kpop_idol_popularity_ranking.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/ficbiii/66739728531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_5ff9317e4b141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_60536aa7d2025.pdfIn PDF document text
    • https://cdn.sqhk.co/livujiguf/fYaWhaJ/23697761602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5feb7c33cda31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_6044a07f80274.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/jeuhcON/gumavunaxekegiruvugaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_6020fdb468e47.pdfIn PDF document text
    • http://kususupodaw.22web.org/4920577634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_603c31ac0453d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5ffd0da02b2e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_d9dda838d7fc49a6830cdf5de03da57b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3baa127-0e0d-46fe-8cbf-55b2fa62dbbd/mine_clicker_online_game.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_fa0638db2c9d409fbbd7dd336ff54ec7.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_87e87c566ac044d79741714a8fd8cf3b.pdf?index=trueIn PDF document text
    • http://dukedofabi.epizy.com/33219136815.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_c107972c7ce5495aaca707bd55ae66ec.pdf?index=trueIn PDF document text
    • http://xinugut.epizy.com/wirekeb.pdfIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_c6808a33782b496b91a921ae6cad9480.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8da5e8-61b2-4472-a669-8043af0f495d/valence_electron_worksheet_lewis_structures_answers.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_off00011a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 5252 bytes
SHA-256: 421ef23a5f6e35470bffd5a88a23cc434c7ea1acc3726fc55aa8155f34eabad8
font_01_sfnt_off00012c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5F 12616 bytes
SHA-256: 360ab794900847d47410df9cdacc7b91a26c128ffe9a94394c45922d780d36c7

Open this report in the interactive analyzer, or submit your own file for analysis.