Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9046aea0d08742…

MALICIOUS

PDF

73.9 KB Created: 2021-02-23 13:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2b9eb2b3d2fbfa0a1ddcace5d906b51a SHA-1: d55b56f3d83c87461a311fd7d3af811cd0cccb48 SHA-256: 0f9046aea0d087422eeaea9d5ed014189cb8d10ae039cbb6ee7d51be0c08585f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The document body, though heavily obfuscated, contains keywords related to 'Mackie control universal protocol' and 'wkhtmltopdf', suggesting a lure to redirect users to potentially malicious or spam-related websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=mackie+control+universal+protocol PDF link annotation
    • http://sawumivulopajud.22web.org/xagegulezukidozomivifi.pdfIn PDF document text
    • http://vodaxuf.iblogger.org/company_of_heroes_free_pc_game.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/tagom-revene.pdfIn PDF document text
    • https://zesudegefomoga.weebly.com/uploads/1/3/1/0/131070027/6884f72800.pdfIn PDF document text
    • http://gavewedek.iblogger.org/bs_player_linux.pdfIn PDF document text
    • http://lasofetuxig.22web.org/income_tax_calculation_sheet_format.pdfIn PDF document text
    • https://vudolexululuj.weebly.com/uploads/1/3/1/0/131070894/1134863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_5fd77a3b10357.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/vebefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_5fdf7e8469c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_601570dfce06a.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/b438383f8f74.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/2bc44a251c8a80.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/3411508.pdfIn PDF document text
    • https://kavavori.weebly.com/uploads/1/3/4/0/134012315/7992696.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/megodipewukitoj/91202085257.pdfIn PDF document text
    • http://rovikejovejoto.rf.gd/rebizad.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/50324149555.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/31564122294.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/52314318448.pdfIn PDF document text
    • http://bomemab.epizy.com/24272813648.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/55424392616.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_off0000e59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 5056 bytes
SHA-256: cb8231ce3a329e519f7183490963e4bad61343ac8f30952190493c76008f4b21
font_01_sfnt_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 10212 bytes
SHA-256: 2104327ea8765e2732d974534c828accceb183c9afa6c70b5d2ad5e8dfb95d38

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