Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91511f0aac0b9f9…

MALICIOUS

PDF

80.9 KB Created: 2021-03-17 02:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff2c2619bef8c1c947c4ae4235b6597 SHA-1: 817fd62ce3c9d2082a616cb100e3e24fd40c1c13 SHA-256: f91511f0aac0b9f9a75658c3bc0dfdf2fc2d07d78e183c20b849449cf46f2293
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/123?utm_term=cavatina+classical+guitar+pdf
    • http://myfoxing.online/keto_diet_recipes_for_beginnerschjx8.pdf
    • http://dasezin.getenjoyment.net/jipewuzedi.pdf
    • http://kotizegosopi.22web.org/zogaxa.pdf
    • http://mon-cmb.best/para_que_sirve_la_semilla_de_moringa_tomadatb9tr.pdf
    • http://nofubajabuv.medianewsonline.com/83317923650.pdf
    • http://choosemadam.site/what_are_the_four_main_types_of_writing_we_find_in_the_old_testament0kv7z.pdf
    • https://static.s123-cdn-static.com/uploads/4500432/normal_5fec378d865b5.pdf
    • http://fosexodepaga.iblogger.org/93519938646.pdf
    • https://cdn.sqhk.co/wozobifanu/5YZidhe/json_formatter_notepad_64.pdf
    • http://nenonazuf.scienceontheweb.net/learn_hindi_through_tamil_in_30_days.pdf
    • http://ita-talia.fun/bovid41ogo.pdf
    • http://modernstyle.pro/workplace_chat_windowsh7j4v.pdf
    • http://kirudikegopoded.sportsontheweb.net/51739509846.pdf
    • http://bubuwem.iblogger.org/password_wifi_androidap.pdf
    • https://cdn.sqhk.co/rojarimeg/5KjaWjs/what_s_bigger_polar_bear_or_kodiak.pdf
    • https://cdn.sqhk.co/votezevon/jejjenq/regomafatixi.pdf
    • https://cdn-cms.f-static.net/uploads/4426697/normal_604b417c333c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sofidusujewa.epizy.com/16812285089.pdf
    • http://dokajita.rf.gd/tuvufumigudi.pdf
    • http://redilupabisaxo.rf.gd/jaderufelapuvifivakusozof.pdf
    • http://fopekexu.epizy.com/galigilarafadezemad.pdf
    • http://gikunipif.epizy.com/23482384056.pdf
    • http://povojenase.rf.gd/56637057151.pdf
    • http://diwavubodinaroj.myartsonline.com/rosogozorol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb0.bin
b44f6b4c147df4bf599bc70a7efcaf4b20341358a36fdc408c619897ccdd94ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 5060 bytes
font_01_sfnt_off0000fff2.bin
296925a637858a8804d386f50ee6538045974b7a49593c5ebd7387b3362bccd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 11328 bytes
font_02_sfnt_off00012640.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12640 4324 bytes

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