Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0a75374d7dbcc5…

MALICIOUS

PDF

73.0 KB Created: 2021-01-10 11:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4af76539a77cf9e96630fac4098bc024 SHA-1: d54be254bb763105036e8f8d7ebf6ac701ce14bd SHA-256: fb0a75374d7dbcc5c7064eb60401174ae34b23cd2e661919f5a6f1237b3042f9
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://traffking.ru/123?utm_term=chatty+cathy+dolls+1965'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery via a spearphishing attachment.

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://traffking.ru/123?utm_term=chatty+cathy+dolls+1965 In PDF document text
    • https://site-1173983.mozfiles.com/files/1173983/60056049061.pdfIn PDF document text
    • https://site-1176876.mozfiles.com/files/1176876/audio_mixer_app_for_pc_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5fc67dc722d5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fb915d5966db.pdfIn PDF document text
    • https://site-1176253.mozfiles.com/files/1176253/warosodunowela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_5fbae76473305.pdfIn PDF document text
    • https://site-1201164.mozfiles.com/files/1201164/todugugemi.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/xisefowu/22019997992.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/scaffold_requirements_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/lurorafafir.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/bruxelles_formation_bf_logistique_forest.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/jofovevuwuru.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/25125859698.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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 5424 bytes
SHA-256: 67539856de89208e71e28d44c55c2cc1b66df00ddadd12ae91a1ee2f16d31994
font_01_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 10980 bytes
SHA-256: ce3a2368ec2dc9d70953b136080ef7c5d5ac94f845ee10be32d6d38e7bd7850a

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