Malicious PDF — malware analysis report

Static analysis result for SHA-256 995168de57ba5974…

MALICIOUS

PDF

82.5 KB Created: 2021-08-11 05:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c01b4584a1b28e27eaaf6d4892d4f50a SHA-1: 99cb3629f7658ff936f59ff0845201a11a0d5ced SHA-256: 995168de57ba5974d38d7820f67aec1abb805aa9021b680de41dca1f6a0c43dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The presence of external URI heuristics and link farm patterns suggests the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a73377845---muwuvetitadilotim.pdf In PDF document text
    • http://evpltravel.com/xv_image/file/46762251136.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/jusatidi.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/fq5s0mf1435s79h9lhk25t2q03/natirosororigumujod.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2b8417f0---dokerewax.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/motomijawagamumidadix.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/877fbe7e340d641fdc2ad0caf0ac4d85/16438121706.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/56146240727.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807a534df8b---1012088828.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/41639520219.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/53928967424.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/vuzemejabanumixosegokovob.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r70f35d93hrn1k16cdfqaokq86/38505592741.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b76fa635afa---tegubofeg.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/91179820025.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/tizewinerut.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/damonufuzefubadegumego.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbd3c661b---496485310.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/farapu.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/pijudujutuw.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/dagasajiwipaxawovel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=libro+de+matem%C3%A1ticas+segundo+grado+de+secundaria+volumen+1+contestadoPDF 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_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 17092 bytes
SHA-256: 76867b667caedc9f36255478e384423880d310d11cb9f20bdb54040d152018a5
font_02_sfnt_off00011e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E00 11208 bytes
SHA-256: 22240b72cf01a21ab4e3258bca11d13958d1dae2e3497533a53b305806377386

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