Malicious PDF — malware analysis report

Static analysis result for SHA-256 9153cb48d9a13fc9…

MALICIOUS

PDF

115.9 KB Created: 2020-11-21 02:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 36b4dd1832a370a6c154986c8ca67366 SHA-1: 868ebe4c286cf32f55e4b862cc5a622ecf09afd6 SHA-256: 9153cb48d9a13fc9ae93492a4f4058b8ae87e51900e2956132f30ca950f0128a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffking.ru/123?utm_term=sigir+2020+proceedings' is the primary indicator of this malicious activity. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, aligning with the 'Spearphishing Attachment' technique.

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=sigir+2020+proceedings In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8819b82ab94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_5fb70ec099600.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/kigavanus/aromatic_non_aromatic_antiaromatic.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/wagibolume.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/33797288934.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/emerson_up500w_sensi_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/tesco_grievance_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/mobile_top_up_code_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/danezasadovujox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7874471-0c26-4de7-90fe-3234d40fa847/fidosas.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/ionization_energy_chemguide.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/52808103683.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/zimmerman_note_worksheet.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_off00018ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AD1 5376 bytes
SHA-256: 0dee66fd0cbe508c043e6148af59d949b751af27f5e411694a8506b43db40ddb
font_01_sfnt_off00019d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D2D 11480 bytes
SHA-256: 493c0017a488787d283d10ee58c553f78a47e8bae6b05477358ab025687c7183

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