Malicious PDF — malware analysis report

Static analysis result for SHA-256 227a758067d12576…

MALICIOUS

PDF

107.5 KB Created: 2021-07-31 10:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6a8834ab6b69ec9c0aa2e4b6bd3d952b SHA-1: 867c48c73efeb656618f0b914e9e8a7072ecd21a SHA-256: 227a758067d1257679bcc67607c62fe87d0928495bedb5c85fc2a00a7bdda911
164 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains a link farm, with several URLs pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.dilipprabhavalkar.com/images/file/30731913214.pdf In PDF document text
    • http://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/72224182288.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/1gitrmkkfm7cuqhalkjehmtpq3/35680031144.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/22277730212.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160723610bce42---botidojoj.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dalohv172a3md39aof9n7j4o33/rupodajimew.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/8785urltm81tk16cpuu9u1bff2/94851217782.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/29963022270.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6698756245---73702741621.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/adf968d3fa015cb8469cad81b22a4909/doregapijazukamijifefujon.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef5c237b89---70167877328.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71f816088e---81599207012.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed60c1c826---winen.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/c2uvpd0ldo8ghpo61k9iit1517/bukupefidorevimetogujur.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/91514899962.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/92938096678.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/tonuwav.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/8927006355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=liftmaster+formula+1+program+keypadPDF 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_off00014144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14144 17476 bytes
SHA-256: db861d0c3b3ddc1069e29ba78d4a4d99163e01207a0d3b3dd25a631414b00b66
font_01_sfnt_off00016e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8A 11052 bytes
SHA-256: 6e8401bdc4e738c57e4da4deeaa641f2b24d1daee93e448fe452a14d6932ebbc
font_02_sfnt_off00018831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.