Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d69438af42573d…

MALICIOUS

PDF

78.4 KB Created: 2021-03-02 20:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 46f55647a8504c71a2554d22102d2470 SHA-1: 2168ecf5a077d610abcae9ea88841c97a8b8484f SHA-256: d3d69438af42573dd0531a9f47e8f3a28d19ec7976b5181597e0f1d0011c7c42
134 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to educational materials, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/123?utm_term=glencoe+geometry+6-3+study+guide+and+intervention+tests+for+parallelograms PDF link annotation
    • https://cdn.sqhk.co/sirepajaku/KHjajic/arijit_singh_songs_2017_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_60263ea83aa19.pdfIn PDF document text
    • https://jekazaneret.weebly.com/uploads/1/3/1/4/131455475/2605045.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/80e8f75a2d58.pdfIn PDF document text
    • http://sevotapapi.22web.org/nigojonan.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/propiedades_fisicas_y_mecanicas_de_los_materiales_de_construccion.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/hhgcjam/76648728282.pdfIn PDF document text
    • http://wojidibotetim.22web.org/book_report_template.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/d2ggtUc/99502576574.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/who_makes_tempstar_ac.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/cyberpunk_2077_ps4_pro_performance_update.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490738/normal_5fda0e9ec5471.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/cClidZ8/91536166240.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/bqb0mjc/29330944334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_602155f77df92.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/hhmiegj/sowawetewexize.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/jhhfIBk/origami_tall_rectangle_box.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_5fdc0082a0662.pdfIn PDF document text
    • https://tusosalowikos.weebly.com/uploads/1/3/1/4/131453146/42ef4a5.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/zajorefepajezir_fitejuta_xidokefebaravo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demiwadipojaz.epizy.com/56847620631.pdfIn PDF document text
    • http://gigitepusiligo.epizy.com/android_9_built_in_screen_recorder.pdfIn PDF document text
    • http://popeganezawojeg.rf.gd/android_pay_limit_natwest.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_off0000f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 6016 bytes
SHA-256: e99a4a1025a9591e14e04b6a41c376278782357cf2defb7a2e55d9d5dc0d1a07
font_01_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 10276 bytes
SHA-256: cca1101f14c64bef31361a0d04de619ff92a8cf509e8dfd5360dd7c3191d95bb

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