Malicious PDF — malware analysis report

Static analysis result for SHA-256 33602ca796a69fa4…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 05:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e74b78397eb3c0a6fc5aad355a3323b4 SHA-1: 8d7c932a927cf2dc79bdf19e4439b5f5ab95fd4f SHA-256: 33602ca796a69fa4edc9ca576b907d8b59a05de937df593d81b29868ffb6a7d4
184 Risk Score

Malware Insights

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

This PDF exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to potentially malicious content. The presence of multiple URLs pointing to compromised CMS uploads and disposable hosting, combined with SEO-focused terms like 'bill of sale florida pdf', suggests an attempt to trick users into downloading further malicious files. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://fruzsiflame.hu/userfiles/file/fajalunozebukow.pdf In PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/cp4fn22t7soe2okl0b5j39rde1/35880643929.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/17156611510.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c4098857---xelopel.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/57849608821.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/22020855071.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893daed8fa1---kadaperevu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b2a33dcc---padekawakexanizemosuta.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/zoboradexalefenakerake.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f78e60a99c8---58860331746.pdfIn PDF document text
    • http://grimastone.ru/files/64685538760.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/94660297647.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/wovewag.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/dadepedevoxifadulemel.pdfIn PDF document text
    • http://119pump.net/d/files/2952359055.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/nupekuxevurelo.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/18721271479.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/si5hnruudsabqm50e18qdor3cr/redelutalebuduwok.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/wasetoruxusigefizefulix.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118db937c3aa---62245876819.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087988612df4---resawira.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/nexaninelova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bill+of+sale+florida+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_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 10340 bytes
SHA-256: 16d90549d05395854299c64799edec178b330cfe54296359b1ffbb1c6842d8c3
font_01_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 17912 bytes
SHA-256: e76dbb047eff99bd07f30618295250743e7d6a2d52f0241370febc414e3997c4
font_02_sfnt_off00011c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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