Malicious PDF — malware analysis report

Static analysis result for SHA-256 668c5f803dc20408…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 11:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d389b81ba854d9550fd10bdfb198957 SHA-1: 43c9e33229dbbe67f5c14c5cb786c25826222594 SHA-256: 668c5f803dc20408117ef07000b02b5853dcf1d1e9bb70a517b9532b5889eed9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a search result page, likely a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=fisher+price+laugh+and+learn+car+blue
    • https://cdn.sqhk.co/gigatakel/gf0bjiI/59527960033.pdf
    • https://cdn.sqhk.co/jinubodilev/jfggI00/nudenije.pdf
    • https://cdn-cms.f-static.net/uploads/4450634/normal_602c0f522b481.pdf
    • https://cdn.sqhk.co/domuzusud/6gfPGhg/word_craze_level_726.pdf
    • http://kozizukexepuf.22web.org/gujibidipilab.pdf
    • https://cdn.sqhk.co/xakawituk/diegggc/td_atomistique_l1.pdf
    • http://xexufonek.iblogger.org/20952668611.pdf
    • https://cdn.sqhk.co/zeliravepuj/thghekh/mubuxedanifizu.pdf
    • https://cdn.sqhk.co/vipujitebiki/dQfFPhj/vufosodijinagotonukuzu.pdf
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5ff29110134ac.pdf
    • https://cdn-cms.f-static.net/uploads/4416331/normal_601c667c88eeb.pdf
    • https://cdn.sqhk.co/rixutixim/Zghuhgy/nafebitivarajigibupaw.pdf
    • https://cdn.sqhk.co/wexunaveb/gfjeicc/52926095129.pdf
    • https://cdn.sqhk.co/xuwadezab/hjWphfM/37622210371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gilotekovipani.rf.gd/helter_skelter_an_american_myth.pdf
    • https://uploads.strikinglycdn.com/files/15c39b44-b4c6-4d3a-a49d-8001f7059a0e/pafabi.pdf
    • https://uploads.strikinglycdn.com/files/97e73f88-fe18-49dc-93cf-701ed8e277a2/lonobidimebatexidiji.pdf
    • https://uploads.strikinglycdn.com/files/5ce1e314-99e1-4c34-945b-531cf95a5fb4/85840768012.pdf
    • https://uploads.strikinglycdn.com/files/dd0cbb89-bae3-4477-8ac1-11f486d56dc3/pizza_pizzazz_replacement_parts.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_off0000ff1a.bin
fd5af9cf11a47828a3f5003d542f254f398a3f10820d03821c5675505fcb3134
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 5432 bytes
font_01_sfnt_off00011184.bin
ad65eb0169adda5967671a96fb33efc829e58068e1d5bf3256a6b9cba74a8f78
pdf-font-stream PDF embedded font (sfnt) at offset 0x11184 11080 bytes