Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f6fe59ab6f47ef…

MALICIOUS

PDF

88.5 KB Created: 2021-06-25 23:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5ea8de8b4d4e8fa1e4dfecd484cc8d1b SHA-1: 19c3c2e89a242f71842064ea5fc024de97489454 SHA-256: a1f6fe59ab6f47ef3de587aa2d133d26abea082909e35f4d535ffe60ad261e52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It contains numerous external URIs and links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure itself is also indicative of a link farm, with many distinct hosts and links per host.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=xmas+riddles+and+answers PDF link annotation
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa727c19d4b---duvezo.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092e03c4bcf2---fikaniteb.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/rupuzoviz.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/76825875944.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/92bbe22648409f9a8c748a4a137c634e/41510788470.pdfIn PDF document text
    • https://vieclamkinhdoanh247.com/upload/files/xodowogolojezavigi.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160907386656d0---guxusulop.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/l2sm713u7j1fkr1qms03oo4m03/nunazelatovabip.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/miberuwam.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/41860000760.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/73876054464.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/3465798574.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/39716972194.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/joxiridupaselivunir.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/89500407719.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160904ab5d994f---gesejotuvutipe.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f99672542---sunegofabigulabepul.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7a13cc3ad52e083ce01f1faa2767d9cd/98514141711.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8573caafe5---37297719321.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/40ke92eqclp779nuvq5c7nic0e/wiwip.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160724f0076ee4---kiretisulewawiraguxuvi.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/vimadotodajiko.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9b6b0a34b---samonopilisiregitir.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/3tsa4i6pd1ttu5tjtqn9ss18i8/gasekajoreres.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/e474917bc1cc1709bd31974c525f09e6/93125590190.pdfIn PDF document text
    • 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_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 10284 bytes
SHA-256: e10f7d715bb32c854d113de95ff7af4ca34c5f09d58ffe1553e75891aa78d45f
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 17320 bytes
SHA-256: 1e5fd7a08ae6d4270688efca8554214161c2e1d1ab8768ca58fde668ca4511c1

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