Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7f0c692391963e…

MALICIOUS

PDF

77.3 KB Created: 2021-04-23 06:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3e79f6c15c662ad7dce35ac48bea5e SHA-1: 1ae99316bc0c1b98725e6be398fc917a4271c232 SHA-256: ee7f0c692391963e2dfae15a25455b1379b1cb3f1ae0acc07802733bd4dfaeaf
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, indicating a phishing or malicious content delivery attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=proficy+machine+edition+error+codes
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fc8dd9ed44f1.pdf
    • https://cdn-cms.f-static.net/uploads/4485166/normal_60128a3640387.pdf
    • http://bududusawuwepi.iblogger.org/sonolusu.pdf
    • http://susarivusu.22web.org/fijekikixepukidafamudoni.pdf
    • https://cdn-cms.f-static.net/uploads/4385235/normal_60203973496b3.pdf
    • http://baxijemapuzoxu.22web.org/92760242218.pdf
    • https://cdn-cms.f-static.net/uploads/4478968/normal_6049e3497a322.pdf
    • https://cdn-cms.f-static.net/uploads/4465704/normal_602b7532b42dc.pdf
    • http://disuxixepere.22web.org/gifigulegojodeborewu.pdf
    • http://lenagilos.22web.org/barrena_manual_para_perforar_pozos.pdf
    • http://tisimewifexumi.iblogger.org/acoustical_engineering_harry_f_olson.pdf
    • http://xojosagefe.22web.org/barron_s_ielts_practice_test.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ea1a26c2-a417-4c0e-9bf5-e17ecadbeb4f/what_color_is_your_parachute_summary.pdf
    • http://kiwesuvumu.rf.gd/darigolegamoka.pdf
    • http://wupobivawenako.epizy.com/nosefiziteku.pdf
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_dfaf171a6c4046b0b58ef53e81b2b573.pdf?index=true
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_e6eeb3ef9ce445749a17df166bccda1c.pdf?index=true
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_9583810c6580474aabe50f5d37c96c0e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1462d106-fd6e-49d6-8a11-92a9ba635b5b/how_do_i_reset_a_kidde_carbon_monoxide_alarm.pdf
    • http://lusozeto.epizy.com/batasogetole.pdf
    • http://jupuluna.epizy.com/99765809647.pdf
    • https://uploads.strikinglycdn.com/files/bc34ce6a-3e48-41e5-b18a-381d1c1bbbed/bepiwosexudozame.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_off0000f1d6.bin
d658675820d8cb08e86c5e66012b81d05456c314e2c78e77ae4037f2bb987a8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5332 bytes
font_01_sfnt_off000103d0.bin
74efe5eebaa921b9a92447f260bfef75aed4dcab8a7c9333e235a5133a49fef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 10448 bytes

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