Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a47030f52f58a4…

MALICIOUS

PDF

75.7 KB Created: 2021-03-04 10:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7ca295f915f1a947a92a1f519699c282 SHA-1: f61fb46ecbabe5bc10a41c79d4c7ff170db8a706 SHA-256: 40a47030f52f58a42876f0e6f035a9a1d37a592ee3bcc99870ea4ee40e18c694
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicate it is a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to TV issues, serving as a lure to click the malicious links.

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://jacksth.ru/award?keyword=why+is+my+sharp+smart+tv+not+turning+on PDF link annotation
    • http://sberpodarok2020.online/baghban_film_songsooj7z.pdfIn PDF document text
    • http://debugor.iblogger.org/fizafafulekobifugisux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_6013c035da5b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5fe856afd15ed.pdfIn PDF document text
    • http://joy-todays.online/pillars_of_eternity_game_guidecrdln.pdfIn PDF document text
    • http://zozuwax.66ghz.com/halloween_contest_winner_certificate_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_600e952195090.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/4jhuOTw/tumblr_girl_outfits_fall.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422877/normal_6001215b48f8d.pdfIn PDF document text
    • http://labanom.22web.org/96266649198.pdfIn PDF document text
    • http://study-english-04.space/20092697121bvg3a.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/enyIjgs/fexebatakolezudibatadeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450152/normal_601c94527a5f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitubak.atwebpages.com/81230300865.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/chess_for_dummies_4th_edition_free_download.pdfIn PDF document text
    • http://revulagolorer.epizy.com/15293818919.pdfIn PDF document text
    • http://suboxasolu.rf.gd/how_to_connect_my_plantronics_headset_to_my_desk_phone.pdfIn PDF document text
    • http://gafamiziwadi.rf.gd/esv_journaling_bible_leather_strap.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_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5376 bytes
SHA-256: c39656af2fcabc2d9215833013f6ef9b55e0e08768c21f913486d2ec1b730e5f
font_01_sfnt_off0000fe94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE94 10124 bytes
SHA-256: 492cde67fe701dd378a5f055cfe74e736a17ce2033b14aa07bafb722ca4c3cb7

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