Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06f6939d0dc5bbe…

MALICIOUS

PDF

59.4 KB Created: 2020-11-25 15:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 858087ef9dea773cd2e901c7605c7dbe SHA-1: d47c9c06281e769043ab256abbcb32348fddab1b SHA-256: b06f6939d0dc5bbecad7ef1efc7826425bc1b9823b8a91ed5f90612a143baa90
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=theatre+the+lively+art+pdf'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=theatre+the+lively+art+pdf
    • https://cdn-cms.f-static.net/uploads/4450421/normal_5fbe301d3aa03.pdf
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/numil.pdf
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/64d39336.pdf
    • https://cdn-cms.f-static.net/uploads/4493578/normal_5fba0057bc300.pdf
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5fb9d78cccb97.pdf
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/1732333.pdf
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/luginezilazer-butamizazav.pdf
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/5518039.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fazujo/pukemilupivodewufemuton.pdf
    • https://s3.amazonaws.com/tumasun/82659407121.pdf
    • https://s3.amazonaws.com/tunenijexe/td_bloons_5_unblocked_games.pdf
    • https://s3.amazonaws.com/widiku/gebisakudol.pdf
    • https://s3.amazonaws.com/viwoxuz/chatrapathi_movie_hd.pdf
    • https://s3.amazonaws.com/febopa/57896655348.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_off0000adad.bin
75e49ccde79bc3b2f19248c70c3f9c5daa5ad6a89f90e4a9e8acec0036650c70
pdf-font-stream PDF embedded font (sfnt) at offset 0xADAD 5060 bytes
font_01_sfnt_off0000beed.bin
670d8e85cb7a744e690a96b844ab22ce9148df1fab44d195e5bbe36747e8e4a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEED 9924 bytes