Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bffa5073e09e35…

MALICIOUS

PDF

85.1 KB Created: 2021-03-23 18:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d9f1be9e35903db849b78d4a665245e SHA-1: dd631640c0723bb6ce251380326d0bcbc38e7759 SHA-256: 03bffa5073e09e3563854fa56003fd3b1dcd9010c8cea29f556bb7c7732e1db6
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and is flagged by an ML classifier as malicious. The document body, though heavily obfuscated, contains text related to 'Securities market operations book pdf' and is associated with a heuristic indicating a fake invoice or payment lure. The primary malicious indicator is the embedded URL pointing to a known redirector, likely intended to deliver a second-stage payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://yafferge.ru/wix?keyword=securities+market+operations+book+pdf
    • http://gopadaxin.mywebcommunity.org/kelly_starrett_becoming_a_supple_leopard.pdf
    • https://cdn-cms.f-static.net/uploads/4495531/normal_602e3f5fd8972.pdf
    • http://vuzetasavuxoso.mygamesonline.org/gurax.pdf
    • https://static.s123-cdn-static.com/uploads/4425515/normal_5ff22c175676d.pdf
    • http://phrensy.co/twilight_breaking_dawn_part_2t38xm.pdf
    • http://hot-money.fun/login_to_wd_my_cloud1vg2a.pdf
    • http://zuxemesemubozo.mywebcommunity.org/adverse_childhood_experiences_score.pdf
    • https://cdn-cms.f-static.net/uploads/4390068/normal_6015ac4665c29.pdf
    • https://cdn-cms.f-static.net/uploads/4391001/normal_601995b321319.pdf
    • http://geesecam.com/vipomasiwfeqii.pdf
    • http://misstourist.info/divine_mercy_chaplet_audio_appakvlc.pdf
    • http://gnatural.space/hotaru_fujita_maiko_sheet_music0hgiu.pdf
    • http://mogimetekojubar.scienceontheweb.net/miluvatimezuxuvepopepopo.pdf
    • http://kapovulup.mywebcommunity.org/davifemebazamawidunapuxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusori/somolosijolasowoj.pdf
    • https://s3.amazonaws.com/wizuluworafid/80060263992.pdf
    • https://s3.amazonaws.com/nawosineromigi/in_app_billing_subscription_android.pdf
    • http://netawuwimirixor.onlinewebshop.net/how_to_use_suddenlink_hd_remote.pdf
    • http://pekiluji.atwebpages.com/phytochemical_screening_and_antioxidant_activity_of_medicinal_plants.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d44.bin
7e2f70b1557daf8f90f072003e977ddf9bb8a2e8b66b6bb42caefc026ac8893c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D44 5576 bytes
font_01_sfnt_off0001201c.bin
6a3141b88220f2a9fd98669d9e73dd6ec22fed5c5004e8efccfd5d68d7ae5e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201C 10960 bytes

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