Malicious PDF — malware analysis report

Static analysis result for SHA-256 445edba99fc8e9d0…

MALICIOUS

PDF

69.7 KB Created: 2020-11-26 06:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: b60c3ceffba391dee3508a753153fa2b SHA-1: dc07868961690954b6a97f6e80d8b2c6782ae72c SHA-256: 445edba99fc8e9d0f52a8be1cbd00b90bba005213f74ca36cc994d3374dabad0
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document, using an image lure related to sheet music to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and external URL point towards a phishing attack, likely attempting to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/wb?keyword=chopin%20ballade%201%20op%2023%20sheet%20music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5fbcaefba55f1.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/xurixado/dukikozatosujekubibana.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/miwobijajobew.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/742669335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfe6122-14e3-49df-9d83-b90700c85ea5/pegizetipov.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/kamibusuzudipufesiso.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/free_bootleg_movie_streaming_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/kuvinekudobu.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/php_responsive_admin_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/12200719425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3bb7aa-fe9a-4d62-bfa9-d5223b821ae2/17183651450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee34109-cc09-4275-9446-e85b43ae87d6/99805921518.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_off0000ce23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE23 5608 bytes
SHA-256: 8118566e3b97f17920250cd98df2bdfc3b7b515c9e81c67a9a0bbb5c4a3b7ae1
font_01_sfnt_off0000e10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 12116 bytes
SHA-256: a346c5f548aba6761eb4b412f2873607b360f381df9c4d1fe860b8923545d7e3

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