Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f19b5ceca22f100…

MALICIOUS

PDF

94.1 KB Created: 2021-06-26 01:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1692abb5f8e5d79ae7a73c0ed10a4d14 SHA-1: 77b01c07cf2e3d6b7e8a12161d16ad8e1f630c60 SHA-256: 9f19b5ceca22f10074e3a17b3b392762fccd845586199c41c829ebd105b06df6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document functions as a link farm, directing users to numerous unknown URLs hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of many distinct hosts and links per host indicates a broad effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b991140c8---bewalewibidokakufepusewag.pdf In PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98765527ee---57942260887.pdfIn PDF document text
    • http://dentherapia.hu/files/file/48195529110.pdfIn PDF document text
    • http://www.bandungmesin.com/file/saxalafabojuloxemelowo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/ja4uachhn3rnrpv0cvhsbg41o1/wuwesaxitu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/db8c2331c54d14463135e5ad2896f6ad/83265076724.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/f063b31f1ed6e24e7ee11b8d72c0a12d/83945932328.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/notixifisesopejabufatu.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-25/20210525083128390720.pdfIn PDF document text
    • https://maclashoes.it/file/56001693538.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b99f184e2ef256622aa2ba79034d90d4/62486611840.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609718bda929d---38724836302.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/o6p64f53ckgf1s8n2k92drcsug/xujurera.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aef9d3010e4---nezoje.pdfIn PDF document text
    • https://micsys.in/userfiles/file/64541586774.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210620_0FA2DFC08CF2F9AF.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/kdp9hlk7g61g9235oh6tum4d53/35492370105.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/kupudisinuveraxubox.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091555926b14---zewibupoperulexino.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e723bffb3---vetotafovinig.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/24491884012.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/b4ec53ceb89936873c912761ad52c963/61017152036.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/vuzudaxigemozasariwe.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/95429190119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=state+of+wyoming+government+jobsPDF 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_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 11120 bytes
SHA-256: 1702779ca4e335512da7470dc94e7b26af42ec01e35920ff9ba87622b9d3a4ea
font_02_sfnt_off00013e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E73 17140 bytes
SHA-256: 91390628a4845bc013cc1e2101bb8544daaf0409955fbabdcbcfd2c33a50883a