Malicious PDF — malware analysis report

Static analysis result for SHA-256 c226855ffeb14ef3…

MALICIOUS

PDF

94.1 KB Created: 2021-04-01 16:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7e5084e2235e3855f14ea796a5f8597b SHA-1: d8fb51ba927a1b2d2f91065dcdd6afb8a604d813 SHA-256: c226855ffeb14ef39b96508943603f793bddbd3cb4236f2263041300fa491df7
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to suspicious domains, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to 'Pokemon ash gray version' and application metadata, suggesting a lure to a malicious site.

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://mezovuduw.ru/wix?keyword=pokemon+ash+gray+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486041/normal_6024c95b73e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_6038123858ba8.pdfIn PDF document text
    • http://zofosopu.22web.org/last_six_months_current_affairs_in_english.pdfIn PDF document text
    • http://nibofope.66ghz.com/87973115747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_600d32f0b7e52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fcbe5ca9aa5e.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gfL5Fhi/40250924729.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/nUgjwic/vmod_2_magnet.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/hhthjhp/photo_editor_collage_maker_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/XgfS9jc/hungry_shark_evolution_hack_ios_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_60245e1fcdb31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5fc87a4be1f17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500669/normal_5fdcee17633f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/konawezefor.pdfIn PDF document text
    • https://dfabac9c-3a78-4d86-b112-ccf1750024e9.filesusr.com/ugd/b46e2f_8bf7161036bd4cfa8acd2b5966b2ad07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/how_to_hack_a_dvr.pdfIn PDF document text
    • http://mefowoweman.epizy.com/78591163741.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_3cc83a06094242c4996f862b69abfccf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/calyx_point_9._0.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_1c2a8f80680d4ffeaeb55f4d259e3a4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/must_watch_hbo_series_2020.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D81 5292 bytes
SHA-256: c3c1048885d07bfe774250da54f2ccbbb0f38767111dc57166a3bedf8fce731b
font_01_sfnt_off00013f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F68 13204 bytes
SHA-256: 4e012fad075cdd2dd30e4fee3a2921c54f1164e69d549509342b3e4f554bbd88

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