Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64fc94661672498…

MALICIOUS

PDF

73.9 KB Created: 2021-01-03 21:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5c00204507b74eed5613db41ff0a3360 SHA-1: e7c83c3b359ca6f00468bdf6a95ab1a206daeb49 SHA-256: b64fc946616724986e1ef4b626a1d73ebe268a7ac9679471806b28aae49ce3c2
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://gettraff.ru/123?utm_term=uno+swap+hands+card+do+you+have+to+swap'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/123?utm_term=uno+swap+hands+card+do+you+have+to+swap In PDF document text
    • https://static.s123-cdn-static.com/uploads/4464865/normal_5fc556b250ab1.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/UgcMjg7/veridafilepupevizaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5f97a4eb7f800.pdfIn PDF document text
    • https://gigadejelurare.weebly.com/uploads/1/3/0/8/130874533/4637164.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/SnIVRlS/go_kart_runs_then_shuts_off.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_5fe9db7d53b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5fb7ecb4d0659.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutisigila/ahle_hadith_naat.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/2017_led_edit_software.pdfIn PDF document text
    • https://s3.amazonaws.com/faserubafa/4504245539.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_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 5376 bytes
SHA-256: 3e0166279e5e1bfa74a0f196bf98104e3107487f7ed37885792f53b8347142d7
font_01_sfnt_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 10576 bytes
SHA-256: 4ef3553dc873260df804fd4a14952e4816714028c460cc4cb9216bdb119218e8