Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c99056903be248…

MALICIOUS

PDF

75.5 KB Created: 2021-03-24 00:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf1e0ec75fe4df19133d373f1efcff29 SHA-1: 1883581573ba38db8f474315092e72c629a99fba SHA-256: c2c99056903be2482920f787925fb7728ff07668843a4f0bd0873fb5cc0db8f4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document contains numerous embedded URLs, with a primary suspicious URL being https://gimoguvi.ru/strik. The PDF's structure and content suggest it's part of a phishing campaign, likely attempting to trick users into visiting the malicious link under the guise of product information.

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://gimoguvi.ru/strik?utm_term=cravings+by+chrissy+teigen+dinnerware+set
    • https://static.s123-cdn-static.com/uploads/4424330/normal_5fcd424754838.pdf
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5ff70d85c771e.pdf
    • http://winoxolupuvil.getenjoyment.net/mazapelogedosibodikugimun.pdf
    • http://kafujaguvo.mygamesonline.org/nintendo_eshop_error_code_2124.pdf
    • http://xinuvaro.sportsontheweb.net/lemuvapajawin.pdf
    • http://damodudajipofem.22web.org/rakekujewazugulexizosugi.pdf
    • http://beviluxenumiliv.mywebcommunity.org/oster_bread_maker_manual_5834.pdf
    • http://lafowesezojo.scienceontheweb.net/understanding_business_law_curtin.pdf
    • http://tubesebove.medianewsonline.com/sirovich_introduction_to_applied_mathematics.pdf
    • http://tuzirawejaw.mypressonline.com/97440506334.pdf
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5ff408704627c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xoxigibutu.epizy.com/la_apostasia_en_la_iglesia.pdf
    • http://xelidamos.epizy.com/driver_asus_x453m_win_7.pdf
    • https://uploads.strikinglycdn.com/files/cfabc09d-8985-4ce2-a889-bbe7a8fa5469/panasonic_cordless_phone_kx-tge233b.pdf
    • http://mowixir.epizy.com/oscar_award_2020_winner_list.pdf
    • https://uploads.strikinglycdn.com/files/56916284-4975-4d2a-9c34-b87b3c1f33e4/61148661457.pdf
    • http://xeviwunukogula.epizy.com/38196598573.pdf
    • https://uploads.strikinglycdn.com/files/3a4302e2-27a2-4726-9762-2af59aea31ca/food_web_free_printable.pdf
    • https://uploads.strikinglycdn.com/files/28277fb7-bdaf-4fee-8a7a-e3ccdb9d1890/learn_autocad_3d.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_off0000e8d1.bin
082eb9bc32119cd64ff693101163a4392708d3f4c3e3a3dc9f3956fe64722e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 5468 bytes
font_01_sfnt_off0000fb77.bin
885c3e49f07ace3d5ceabdac12f254806435036917f6a6700e05fd27f40da0c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 10380 bytes

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