Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4e817c06005460…

MALICIOUS

PDF

70.7 KB Created: 2021-03-24 04:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14cb81a0fc01589931e86471a0d62b63 SHA-1: 750408e880b9c62da68525e98ce13dbfd551abea SHA-256: cc4e817c06005460f571c4b92453d30dc227bdf1085e4c1ecf862fc7b6ad389d
134 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 trojan distribution attempt. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/wix?keyword=tyler+the+creator+wolf+download
    • https://cdn.sqhk.co/lexoxuxoluvi/eheifYs/locality._nyc_neighborhood_map.pdf
    • http://krokoboko6.xyz/512319660049tzll.pdf
    • http://tuwimig.scienceontheweb.net/web_application_security_interview_questions.pdf
    • http://rawitotizoxuk.scienceontheweb.net/footloose_industry.pdf
    • http://axacheat4.xyz/5267310385952yj6.pdf
    • https://cdn.sqhk.co/gojinuma/ogdsjhH/stickman_army_fps_shooter_stickman_counter_games.pdf
    • http://duvejajenivogik.getenjoyment.net/farokimuleduwuvut.pdf
    • https://cdn.sqhk.co/fotajoge/geHNig4/alphanumeric_reasoning_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ludilisi.epizy.com/77079986506.pdf
    • https://uploads.strikinglycdn.com/files/7dc3e54b-4c28-4df2-9ec6-d6209e88957a/the_seven_laws_of_spiritual_success.pdf
    • https://s3.amazonaws.com/pewebopufupe/16591472455.pdf
    • https://s3.amazonaws.com/vatakefojunib/zevotumurimoxolojedavati.pdf
    • http://xijotat.rf.gd/mimubarogimoledi.pdf
    • https://uploads.strikinglycdn.com/files/acfd6283-a3a3-4ba4-8500-dfecab8d06d3/46374141499.pdf
    • http://gujusama.rf.gd/73818144379.pdf
    • https://uploads.strikinglycdn.com/files/4d282f2a-9390-4d10-9b31-8829f5fb93ad/samsung_m2070w_toner_not_compatible.pdf
    • http://naxefugoxodikow.atwebpages.com/febrile_neutropenia_adalah.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_off0000d0c2.bin
c06fcd96fb88a796b51553d16ad9f0a1789ffd6e363b99098024dff46073a723		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 5072 bytes
font_01_sfnt_off0000e218.bin
8e29a7f51fde1a5d0588a9a7789a3255b79b137e61c2a80156b41f5c21d3f488		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 13696 bytes

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