Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61926136c3fb56f…

MALICIOUS

PDF

75.2 KB Created: 2021-03-27 21:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff8dcea09bb52bc1cbef5c20475f209 SHA-1: 7f345a4a9e0d00c0899ff337ddd78ecfda3ce61e SHA-256: c61926136c3fb56f02d06df05b887f29baf67372f16f904d2126a91509763f01
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=what+are+some+of+the+easiest+dogs+to+train
    • https://static.s123-cdn-static.com/uploads/4367312/normal_5fe3fa8a51a89.pdf
    • https://static.s123-cdn-static.com/uploads/4443824/normal_5fdf0ef2743c0.pdf
    • https://cdn-cms.f-static.net/uploads/4419195/normal_604e0d8a0e094.pdf
    • https://static.s123-cdn-static.com/uploads/4374196/normal_6000c3af08cc5.pdf
    • https://cdn.sqhk.co/wenewojufaj/ildiec6/64681769260.pdf
    • https://cdn.sqhk.co/fibapezo/djiijcj/88814486014.pdf
    • https://cdn-cms.f-static.net/uploads/4459323/normal_6023cfc592e8f.pdf
    • http://muwawukiseka.iblogger.org/employment_news_paper_online.pdf
    • https://cdn-cms.f-static.net/uploads/4452374/normal_600e226e8d87a.pdf
    • https://cdn.sqhk.co/balaragu/Hic5Uhj/84482173092.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_602cf510d12c4.pdf
    • https://cdn.sqhk.co/tuponapalab/ijaSgfO/41080363189.pdf
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fdb0cb77f871.pdf
    • https://cdn-cms.f-static.net/uploads/4449996/normal_60223ebb9ad4d.pdf
    • http://suposisubi.22web.org/fusedodir.pdf
    • http://kuzikugipitimiz.iblogger.org/acymailing_documentation.pdf
    • https://static.s123-cdn-static.com/uploads/4366331/normal_5fcf70a948c0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pulawev.epizy.com/clash_of_clans_without_play_store.pdf
    • https://uploads.strikinglycdn.com/files/c2d87359-bc94-4c78-88ba-0d0ae08a15ef/71920777142.pdf
    • https://uploads.strikinglycdn.com/files/939b73a6-05c1-466a-a09a-3168e033c658/susopatiwipag.pdf
    • http://meferujapepaz.epizy.com/how_much_does_google_books_cost.pdf
    • http://sidiwen.epizy.com/jexok.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_off0000e949.bin
8b21d8c7bf9c8473b471137ccb78513af0c544cbc1d142e0cc7750e8009e952d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 5304 bytes
font_01_sfnt_off0000fb39.bin
f99e2fe5047b43ae393e82eb548f3172630e4b0bd8abba616d94f53ea9fb89c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 10532 bytes