Malicious PDF — malware analysis report

Static analysis result for SHA-256 d946b3886b93d911…

MALICIOUS

PDF

87.9 KB Created: 2021-07-03 11:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7e5ad359724a5e1442b36a98ef2007f0 SHA-1: 56bdcbef1a7ccbc8d16dddba392c16fcba4d4421 SHA-256: d946b3886b93d911dce9010d8e0591f63a9e71cbb097ae0068f4c39bde568a88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to lure users into downloading malware or falling for scams. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/c1f795ce62a2f39d2b35c2dcc6c29653/51298721085.pdf In PDF document text
    • http://birnagarcollege.in/userfiles/file/34017396063.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/aengdn1rd67ff8foen5lfvsqi5/99505496081.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/98618675315.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/db088c4ff655783defc2f37e8e33de4e/15770089435.pdfIn PDF document text
    • http://strandedtattoo.net/file/jalaxawazotilekozeronuf.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/46752367681.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bea1220aa---99860679995.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/1t5hm8vjq5doar3gdcs75nhdnf/mupedipiwarubizevatipe.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/piromugutod.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/rukagikuxabubedatopor.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/sonixebaxojanibabo.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe4cc9faf---wulufaxo.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/14330145106.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04ef46768c---46524158548.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/6183549232.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a5d0a1fc17c484b2798877565fc1afa6/25721164039.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/b10533afa32b837c88a007381adca1e0/rowutojekogelixakudigoz.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/50213566507.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813231eaa1d---bejekimege.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/labaruzawuzamiki.pdfIn PDF document text
    • http://waterreducer.cn/d/files/1141435959.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1c77436d4---61099109566.pdfIn PDF document text
    • http://kodcomputers.ro/2664/uploads/wasodubasotukaruvenegite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=office+2007+download+with+serial+keyPDF 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_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 17284 bytes
SHA-256: 901dde0a809df863f6d8bb391baf31bb508823057969e6a3d2e77a13b7521d0f
font_01_sfnt_off00011fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D0 11184 bytes
SHA-256: b9451835992eb99afce633c7ddb83dc92d932f2972755205172b0f399dd92bbb