Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a470e7c48fde9b…

MALICIOUS

PDF

66.8 KB Created: 2021-01-04 16:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 315322ff3cf52c8dc2cf040f4ba32a92 SHA-1: 3527d5947ea98983d4b3d21c6ec0f6da118eaa47 SHA-256: 90a470e7c48fde9be3303bdb19ffc2455da74c721bf4d5b22531835d689f7437
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/aws?utm_term=neurological+physical+exam+template'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=neurological+physical+exam+template In PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fdfa9ce20cfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5ff27982586c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f875ed12785d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529697/normal_5feaf5037caa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f9b3c3801012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_5fd61353e85ad.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/bcb0f913-892c-463c-a3b1-e21f0569c90d/honda_element_seat_covers_2008.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/nudefipebaloporuwasimo.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/map_of_canaanite_nations.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/bactrack_c6_keychain_manual.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_off0000c876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC876 5484 bytes
SHA-256: 770fd5ace47c81e2d0a2ce1cc3603a26277208c791a6dd7a33844a0a9a9b6893
font_01_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 10420 bytes
SHA-256: 414aac5f0a028b906bda9ffa8582323febac2de965b0d65f923930c0c69e1caa

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