Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5f0a90d87fe897…

MALICIOUS

PDF

79.9 KB Created: 2021-02-26 20:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b0f5567665ffa0c8d758dbce5338d577 SHA-1: a466d4e400e8f35e0b9c31c9cadd345368559d7d SHA-256: 0c5f0a90d87fe8976f16818594f30c46c80cf54ea39f8b13e55b26fc5944cdb2
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 external URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its intended content beyond the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://botokaw.ru/strik?utm_term=how+to+draw+anime+head+shape PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491410/normal_602fc1e67b9eb.pdfIn PDF document text
    • http://wigevopane.iblogger.org/65962540312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5ff4beb7577f4.pdfIn PDF document text
    • http://bedusopuzal.22web.org/pujubidowazeguwivaw.pdfIn PDF document text
    • http://afterdealer.pro/lean_canvas_template50069.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/how_much_do_merchant_navy_get_paid.pdfIn PDF document text
    • http://winoorama.space/63880910658sggkw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fe6cef69cff8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5fef89cbbf48e.pdfIn PDF document text
    • http://worldworkbook.com/six_of_crows_netflix_cast_ninayy20z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455916/normal_60060126e71f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fd198ff29831.pdfIn PDF document text
    • http://wazasutosas.iblogger.org/acoustasonic_junior_manual.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/44816136686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461746/normal_5ffe25979f17e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokubuxopid.rf.gd/boy_in_striped_pajamas_movie_cast.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_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 5220 bytes
SHA-256: b7f0be90834fbfafa32e830be418bb521a51553f7fc17b72a38dd45d589f5e62
font_01_sfnt_off00010f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 10364 bytes
SHA-256: fab50b33af80554ecc6b3e181dfecef97ef64c0a8f0b14ba75d3b57ae72d69e1