Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad096a9cb9ffb91…

MALICIOUS

PDF

76.5 KB Created: 2021-09-07 05:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70c7fba2b0a17c2409c5fe873b72d658 SHA-1: 0d248c8fdf78f7aca95e253b14723447cddeda15 SHA-256: fad096a9cb9ffb919b2905416ed247ddb83ac775382311117a9dc8cdadd48015
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL analysis and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/1b0466e6610dd1d863149627de06e80f/23765449089.pdf In PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/32888805453.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1c09f7ddfb46c837a894690378ad28d8/45088621629.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/gopuliwowomanamule.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afddbb310a6---ganakodamopododa.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/fd00c3c66dd1e1e551f0521a8f9b1823/18884022017.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612c6725eda61---nevikenadewimowesavexize.pdfIn PDF document text
    • http://ccsl.asia/files/kexizemotizezatipuros.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/32288122134.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16078bfb5ef124---wopaga.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/xupamoxufikiwelikuno.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/25665797733.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/oo6sopomp27blsm1mdq5qtil95/60351279628.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/bc0mg0e34avsnb13gpcuuift1h/dubozelej.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/oqsq2r26oai2ikdjvj28hkstnn/73907241930.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/bixozonaralagifep.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/f60feae182eb548f7e8008f979d3a5b1/bovapatunigefipefuponas.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/ruwuwofagem.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11b84dc850---91148965969.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b83b244be64---56618907266.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/24218264834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=directions+worksheet+for+grade+3PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E1 11060 bytes
SHA-256: 9c08fdbf4475298d7855bab9f482563faa6026f8e5bcd7615367bb6226719c47
font_01_sfnt_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 17032 bytes
SHA-256: f7a155fdaa32634d35745586c9a7039b5b63bdc91c915dde1cafa3b0fd53cbbb
font_02_sfnt_off00010ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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