Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9957a5292108d2f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-13 19:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 19ae75c9ff27a71d4d412ff3b941f393 SHA-1: b0cecdbbe1d9ab9ae297fe996a89410141dce3db SHA-256: e9957a5292108d2fc1778c8c24915b268a7978e501f730608753ac504d905fc7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=bill+bryson+at+home+pdf PDF link annotation
    • http://zebiripu.mygamesonline.org/96089555787.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/KXpZjfk/top_healthcare_marketing_agencies_in_nyc.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/pebolokutudisore.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/xupogujewurokil.pdfIn PDF document text
    • http://rabifew.iblogger.org/8458117789.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/jjUd0jg/avast_2019_full_free.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/ps3_controller_charging_station.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/honda_gcv160_carburetor_parts_diagram.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/75916317401.pdfIn PDF document text
    • http://tinipen.medianewsonline.com/xilejunox.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoverol/wgcEbzt/97001052027.pdfIn PDF document text
    • http://fowujuli.iblogger.org/how_to_teach_basic_writing.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/89494390981.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxamilip/hdibibv/neon_chrome_switch_metacritic.pdfIn PDF document text
    • http://xewuxufulizifu.22web.org/engineering_leveling_guide_1-_375.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/kasepagoriniramovabakum.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/hjehjez/44794542691.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/simesigamosak.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/bevheje/walupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xogimutidum.epizy.com/traductor_espaol_a_italiano_gratis_online.pdfIn PDF document text
    • http://kexojupi.rf.gd/best_portable_am_fm_cd_player.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/lee_county_florida_school_calendar.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_off0000fa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 5572 bytes
SHA-256: df4320122e0e15d9df689c0af660baaaa0ddd6cb3566feb6aade6fe398e90d5c
font_01_sfnt_off00010d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D61 11384 bytes
SHA-256: 4b1b4148f66b630b17969e93df958d1aee40c16db1c3a98f7e4b419be8ea98a8

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