Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e23a002b9bd3145…

MALICIOUS

PDF

65.3 KB Created: 2020-12-21 18:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4a7772826551b57f5a269dc41dffaa08 SHA-1: 555b425e968a614433b26b828aeae2aec5c08ac0 SHA-256: 4e23a002b9bd3145f4f898bdabc9cf2454a61e5fca009c4c083c84a20da90955
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=dimensional+analysis+factor+label+method+worksheet+answer+key'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=dimensional+analysis+factor+label+method+worksheet+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8b80f794682.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/zadejoduxid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fb4ecca90f0c.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/dafff6f1-7d10-440f-bd42-9e8993e77327/11370140130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555c985f-d1b9-462c-8646-393fc8c3eac2/48253159917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dafbce8-c8fb-44bd-8dfe-fce512aa8191/81323388350.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/crestwood_movie_theatre_fandango.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/curriculum_development_implementation_and_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d10fe37-f572-4d08-8f25-cf5470cdf78c/fojomitefinuletuvef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39362062-4172-4ba9-b262-c2b2876e28f5/98869871512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f398726f-db6d-4145-845b-6988e0637dbd/18652091970.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/google_script_spreadsheet_format.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_off0000c385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC385 5656 bytes
SHA-256: 94ba88edc5b54ff45927c8007b88d8b9cfb4d9bde6e32c4266b656d2b1dc2bc0
font_01_sfnt_off0000d6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AD 9936 bytes
SHA-256: 55952a8e2def96870fb0f6e90f969b71728155fffb4d9be9d78b637da09eab85

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