Malicious PDF — malware analysis report

Static analysis result for SHA-256 909237d634984538…

MALICIOUS

PDF

68.4 KB Created: 2020-11-16 23:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 749f048dc12ff3f5e2bcdf7715f58994 SHA-1: d4a244b7af18deacacba6cecd4072efb85c1f280 SHA-256: 909237d634984538d2f5e00cb2bc04af1e8da705ec24436db91cd3f10fc980df
162 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=toyota+yaris+repair+manual+2012 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f962e8ce2c27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5f9a73e771f37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e56a9d7-313b-4eee-b308-397fc050159e/rojogafozuzamikoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/gedajuvikubanufekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77cf7eed-2147-4206-af22-4d90137b4ae4/openoffice_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/bet365_apk_mirror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd97261d-7d42-477e-aa84-a4c6f562476b/rugepijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd2863c-c754-462f-a5f6-30625faae1e1/lidadewenepobu.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/bhagwat_puran_katha.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/32684157873.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_off0000cc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 5344 bytes
SHA-256: c424dce62abb5ddc09dbc89b4d1c43dcf862e775da71924460eb277d88698b58
font_01_sfnt_off0000de6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6F 11552 bytes
SHA-256: f3cec4ca47f844fcc250706218bb7ea314b5687b7f40667dc773b1e72fca83f3