Malicious PDF — malware analysis report

Static analysis result for SHA-256 162278700293d2eb…

MALICIOUS

PDF

95.6 KB Created: 2021-07-17 03:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 13d1016cebe87f1eb5280a80e8cbc777 SHA-1: dc89b5d076eceeda84989c5c58b6f8e55bad745e SHA-256: 162278700293d2eb09480775432dce89976ddb07b96f4b181862d96d830d0967
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple compromised WordPress upload links suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cafd3c76ae---20533888764.pdf In PDF document text
    • http://bandenplaats.nl/cmsimages/file/tuxosukifukanafoxigudosoz.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/cn57v09u12h1us7lfdjmiv4qbt/8085542869.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0522252c7d---42334568470.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98648c817---notigen.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/74078514280.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/59554907709.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d19078b4431---nibibapadulo.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/as13v7ndc297ggg9d13e0bmqtg/mudopoduxilam.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/bomoroles.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/72353405197.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/2073ee63b914d4d9f2a7044a8a302802/32879631944.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/77953142804.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-12/20210512090036360129.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/62276129837.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9bfef0d73---womozuxokofuwijupejisimi.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/31761407015.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609428bb75790---8833743916.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/lasapunitaxivemiforonugug.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/xunaraluvumajusuvedito.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/bodupovomenakemapusate.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19577f3e5c---rafowejazisap.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/doligijemokeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=gold+and+hyperinflationPDF 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_off00011269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 10580 bytes
SHA-256: 6390243edccbeae1e1c234a2317d8853dcbf65b41f6a4cce65435085627a5c78
font_02_sfnt_off00014290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14290 17792 bytes
SHA-256: 1f1badc3113990ce42a5a7e4e30e771743332387bced4e25e957b91c5928a593

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