Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba54736eab00f17…

MALICIOUS

PDF

68.5 KB Created: 2021-03-03 22:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: be794ec14b1b4046b8d15798894ddec3 SHA-1: 5167ef4f0ec8bab95fab62824268311f1d0c3fc3 SHA-256: 4ba54736eab00f172e490b0012d90d064c7b0865b8e9e0e7028a34d16cb03b70
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a page about resetting Panasonic TV settings, suggesting a phishing or social engineering lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

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/aws?utm_term=how+to+reset+panasonic+tv+back+to+factory+settings PDF link annotation
    • https://cdn.sqhk.co/nivodoruw/H4Zjhfx/meteor_shower_michigan_october.pdfIn PDF document text
    • https://cdn.sqhk.co/jorimalid/xijCCxf/29406837702.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/fXxqjg8/27287120386.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/IQginAC/zenubinasebejok.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/jhd9Ijc/16077601336.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/zatasikizinekonur.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/aKNhfOx/98921536182.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/gjaheih/2397726208.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/hhicjdk/jesse_virtanen_elite.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/jjzid64/45339937239.pdfIn PDF document text
    • https://cdn.sqhk.co/xesagomi/jaxjaK6/wajirubowekisozob.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/ijg1NUq/91201631150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5fcd012c3e420.pdfIn PDF document text
    • https://cdn.sqhk.co/vimibaja/hep0jhQ/16516167865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_600c43e305585.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/D5jfihr/light_up_mirror_bathroom_battery.pdfIn PDF document text
    • http://detonic-ufficiale.website/jezavopaleysne.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/jinekigovibeg.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/wuxuzexewep.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/us_coins_red_book_2021.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_off0000d015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD015 5572 bytes
SHA-256: c1bedcd9e54bd508924ed9cd7638eb2af45d6b565dff59249725950885839183
font_01_sfnt_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 9776 bytes
SHA-256: 9d07c939d544bcc22212618b58575a74f8067c8e611cf00f9c8485fe3743f5ea

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