Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0fec6ecb3a6e8e…

MALICIOUS

PDF

73.8 KB Created: 2020-11-13 08:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d49a546ba20dee491b7a76f1425a1d89 SHA-1: 1b3f77358a227597c825f5e96d1b8a1ec9dee4d9 SHA-256: 3d0fec6ecb3a6e8eb6db16f009adbfd898e46433374845e9e7c92d60c979b451
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to piano sheet music, aligning with a phishing attempt to direct users to malicious content. No scripts were extracted, but the presence of a malicious URL and the ML classifier's high confidence indicate a phishing attack.

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
  • 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://traffset.ru/aws?utm_term=b+minor+scale+piano+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f9557bbe9d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f9851d67e35d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f876d1e531e2.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/6ef3c2d7-d525-4134-b4b8-c63358083ead/nubebixokiwexadadujeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150f31ab-6a61-4078-99cf-0527dc56b1e1/hexxat_romance_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc55b108-f814-42f0-9401-857491126032/joxirimusipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41e110e-b900-41cf-966b-d63c9173dc7d/72873726786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820cf306-7229-457e-84bd-7269317c7410/fifty_shades_of_grey_trilogy_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/nonokolufowozamored.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/latin_america_outline_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/dri_wash_n_guard_for_the_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc912f2c-c181-46e4-894d-a83dc546e12e/fidovosemoxugixavex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce108809-bc8e-4596-82d0-57ebf2db8f92/rulimuberiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e89df1-4748-4b5f-9c0e-7fd7f6a183dd/gedalapitigal.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_off0000e08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 5224 bytes
SHA-256: b44e4a40c47e670a49040d54729c46145498ba7b20b87efc215c08a281859c83
font_01_sfnt_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 12440 bytes
SHA-256: 30541667cfcdee05feeca903a3cf1bb4588ca84aef277ac4a5d9ead24e641d22

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