Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1810a5ccdeec3d…

MALICIOUS

PDF

100.5 KB Created: 2020-11-14 00:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 82a9dfd3c3450d999b3d6aca3f5ce282 SHA-1: 1891639d3c1398d9b7887f2f66c29c48d370e20b SHA-256: 6d1810a5ccdeec3d3eb50566d23a9e58f6dbd003dc867afb61d4c66abb69da7d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'dermatomyositis guidelines pdf'. No scripts were extracted, but the presence of an external URI is a strong 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
  • 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/aws?utm_term=dermatomyositis+guidelines+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448976/normal_5fa505c807870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403266/normal_5fa8fdcad7bea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5f9c71ff94756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f94dc4b62566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f8f44bbbf891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9c3b4e68b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_5faa7d43e0a80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f9af9bee7e59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425912/normal_5fa9194c62471.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/ruzaganog/sixugojufusus.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/plane_ticket_template.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/words_that_start_with_phone_prefix.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/video_from_link_to_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/cursive_alphabet_fonts_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0fa065-f372-4b51-ad1f-8b1875d3bca1/73567123742.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/performance_appraisal_project_report.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C0 5464 bytes
SHA-256: 2810d164fd74adbd1b7d8ef901ab03449570bd4177ad82035ba547ba7c2ef8ce
font_01_sfnt_off00014950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14950 11228 bytes
SHA-256: ae4df836bcf8bcda599e764eb6aa81c93ac9e2133c161ca9412e432e9e8a10fc
font_02_sfnt_off00016f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F5B 16152 bytes
SHA-256: f77e8d23811290204c0130f1b7bc9a98e548868f4ca93fd60fa0e5b361556ce4

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