Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29370601ffad0d8…

MALICIOUS

PDF

76.6 KB Created: 2021-02-27 08:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5c8f4bf930ce3d6531a4d94809161807 SHA-1: 062c2fb7c7d8cac66a7af124bc37edcaeec8eaf0 SHA-256: f29370601ffad0d83351695f3be4e10655fc1de84c5a69e7c0cc7fbf416784b2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the overall heuristic profile strongly suggest the document is intended to exploit users through deceptive links, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=boston+t+party+gun+bible+pdf PDF link annotation
    • https://cdn.sqhk.co/sisuriwul/g2y5gi3/como_baixar_hamachi_para_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/jbihWK8/rugby_world_cup_2023_ticket_sales.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/3886598.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/R0hgjdm/55256026257.pdfIn PDF document text
    • https://bupuvebawa.weebly.com/uploads/1/3/2/7/132740405/xifemekovefus_vibiteritane_xovute.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/run_for_your_life_midtown_charlotte.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/zekuwugapasafozovixevingdd4.pdfIn PDF document text
    • https://wukajimodowel.weebly.com/uploads/1/3/0/8/130874313/8714379.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/djbqqVT/dexasif.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/8924479.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/h8CjgSb/nasty_gal_returns_portal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujapomib/29661440620.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/apache_tomcat_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/crystal_violet_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/sapumidofare.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/how_to_build_a_septic_tank_leach_field.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/wevixugumuwijaveninobo.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_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 5500 bytes
SHA-256: ff3f1a495354934d1ae87c1640dd19f32b0027f6a7b6a55f135003b1425539e6
font_01_sfnt_off00010241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 10196 bytes
SHA-256: 75fad0c9f2900c85398d2f0d282251cbde643dac2cc1ff6e059d162982d60c11

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