Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3da5932f564b03b…

MALICIOUS

PDF

59.2 KB Created: 2020-11-18 22:31:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 59b931c12e7080d433e488af759d0908 SHA-1: d58f3b1432cb96dd5c84cdd531effbfc536152db SHA-256: f3da5932f564b03bbe048d910d0ef9a849591939dfa1a187b5b79a2f174acc52
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/strik?utm_term=dice+and+men+epub+download'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=dice+and+men+epub+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_5f9bd13c320d3.pdfIn PDF document text
    • https://numomepezudoti.weebly.com/uploads/1/3/4/3/134320197/c6ca75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5fa1488bf2500.pdfIn PDF document text
    • https://sibafuguwo.weebly.com/uploads/1/3/4/6/134679660/mawikuzexebozafovoge.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/30d0c74b-894e-49cc-8c53-a49277ee5bb9/80255834024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d6d427-22b8-4587-99ee-f21f7e3da081/bomega.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/joindre_deux_fichier_ensemble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d650ca27-14d6-4967-8ca0-b81b59247c63/novorat.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/kokenejoritagalalevami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a20aa3-4973-4309-a85e-c872e7c2cdee/73817334257.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/function_calculator_mathpapa.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/14949308097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/526408a7-8d54-4043-ba81-adf8bb587db9/gabexebipumewufup.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_off0000ac5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5A 5176 bytes
SHA-256: ef09783041aa91c8b55e1d347426a2b6d75c2dbaf4a6ea91f77412ed0d848fb4
font_01_sfnt_off0000bdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF8 10096 bytes
SHA-256: dfb7c2e9bed7bcc6c4547e15036f4551a2610a964c8aa927cbb6622af56502c5

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