Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8feeb8a496b4464…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 20:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea938855e3c5a5a83a903d68ae54b15 SHA-1: 8ba4d9b654803069041405af3cae8d95384d4823 SHA-256: a8feeb8a496b446474e6e364270b1f57bd821197e586fcf7aed8eda4c3b584dd
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The primary URL, 'https://fokemale.ru/strik?utm_term=justice+and+the+veil+of+ignorance+examples', suggests a phishing or scam attempt by masquerading as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=justice+and+the+veil+of+ignorance+examples
    • http://tigusomoxuwij.22web.org/92903878035.pdf
    • http://texno3ua.com/15172382754wd0wp.pdf
    • http://voseboler.iblogger.org/facebook_transparency_report_2019.pdf
    • http://chambreapp.xyz/telecharger_add_anime_apk_1._8._1rr08w.pdf
    • https://cdn.sqhk.co/jasowipe/vifGhgF/racing_games_free_download_for_pc.pdf
    • http://itprod.space/79105703131pom4l.pdf
    • http://kafojiv.iblogger.org/what_are_the_4_layers_of_a_rainforest.pdf
    • http://kuxogajow.iblogger.org/40819317437.pdf
    • http://55571.ru/casio_mj_120d_user_manualvf4e8.pdf
    • https://cdn.sqhk.co/tifozeborot/jbhjdqV/snake_identification_chart_wa.pdf
    • https://cdn.sqhk.co/vokalater/heIwJij/ice_cream_roll_machine_ebay.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nezenomawaza.epizy.com/26777413112.pdf
    • http://zobawukesilebaf.epizy.com/bollywood_songs_video_2017.pdf
    • http://jedalavupu.epizy.com/tunopa.pdf
    • http://gatezuzemup.epizy.com/la_psicomagia_de_alejandro_jodorowsky.pdf
    • http://nadurajamewe.epizy.com/assassin_s_creed_revelations_apk_sd_data.pdf
    • http://tudutov.rf.gd/2227745634.pdf
    • http://sedilar.rf.gd/nuradupe.pdf
    • http://rawatakutuju.rf.gd/wuraxifafa.pdf
    • http://nidajoxof.rf.gd/fovorekanelom.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_off0000e69f.bin
38986a0df8dfc7d79b7ea99b0259fa4b76ef51f8ce2e86b9025f47e29859769c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 5684 bytes
font_01_sfnt_off0000f9d9.bin
cbc125f5cab6596693803730a9aad1f3946e5281d262091ef1393ac1ab462d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 10620 bytes

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