Malicious PDF — malware analysis report

Static analysis result for SHA-256 54044d111bf9deb1…

MALICIOUS

PDF

86.6 KB Created: 2021-09-04 20:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3a22aded83d14146072d3c4bacd6e271 SHA-1: 8c9019835938b8f6376c12f40636cbe604061193 SHA-256: 54044d111bf9deb1c0d35362cf0eaca69aed1424ef27b3121f440a7faf71e913
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a PDF document that exhibits characteristics of a phishing or malware distribution lure. It contains numerous links, many hosted on compromised websites, directing users to download files. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document may attempt to trick users into revealing sensitive information like private keys or passwords, disguised as a recovery process. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c3d1395fe7ed5a48debdc24c268445a2/wikibubagitigujaxub.pdf In PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/8ed0454d45383dbfa46eaf0171ac32b2/satunigapuwima.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/33886331242.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ah3rv9g0ntnugnggrhlm0e23f0/56584419012.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d8effo3oejg7mupgidhbe0h9q7/3617389284.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/tezesupupisodukewanuxil.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/84aa864437bd0e2a2e95bdba363b4bfb/15289949279.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/12depu75oej6ed762p3a53a7i0/sodalupogupedelemonep.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/17742988787.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/maldma7omk2osc8uv9im0v1ju7/wewejenifa.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/puledomak.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/zutewa.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9ebdf25ba8f4a0cbeedab68739ea44a6/76018133945.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/jlc9o0c9ta74l53lvbditnei0t/24240294408.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/muzapakixutixepidujefep.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/wamanujibubijezasodatak.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/raguxotetolenomonuduz.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161101056cf341---4059722342.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aba7f007b7c---zuziwafe.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/130681aacedfc3c7febfc7b6e68dadf4/72627454089.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/51011623740.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/71783910776.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/49816508368.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/80194764376.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/1a7d6e4352bde82048dfab619f54c9be/50055354026.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/zejijodipanuvepum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=foxit+download+free+pdfPDF link annotation
    • 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://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_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 10488 bytes
SHA-256: 5f57dfdceed1cfa7d6a817c5966baa6d0fad1dd3252297b6d330ea3060e05999
font_02_sfnt_off00011f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9F 17312 bytes
SHA-256: a5769a04e1d294664fc1fb2be07801cd276230138256c9120c6b8c58f4ce407b

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