Malicious PDF — malware analysis report

Static analysis result for SHA-256 8091cecb06811adc…

MALICIOUS

PDF

89.4 KB Created: 2021-07-01 00:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 59d82f64f02a4ebf8abc64fc3d1faebf SHA-1: 61cbbd2bc8cb53be8cb91695f4698a2c268867d2 SHA-256: 8091cecb06811adc52b9d7d958e4b72e5c748bf9cc7ccb56d845fa164048f092
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic firings strongly indicate a malicious intent to redirect users to external, potentially harmful, content.

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://allytemp.ru/uplcv?utm_term=lewis+symbol+of+the+common+metals+and+nonmetals PDF link annotation
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073850225714---97144112388.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/xikawufelifikefimivepapak.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/dededulemubigedif.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/44539438380.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/85116192510.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/730339c6bfd0b832613387fb951f865c/jeliluwolakub.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f63514992---32905109088.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfee558e63---gifinavogibewisiravo.pdfIn PDF document text
    • http://dichvuketoansg.com/luutru/files/nurodiwapapawo.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/97444656047.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607157238e742---mabadofifobamaxotex.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f7e18b1622394e4becd58be55570f846/52084057100.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///pojumewinukutadibozazoz.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/naragedurikegujiwiza.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/52053943437.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/70b08d63183c7e1c36bf1aa79270a3f0/88486809093.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608844f236ade---96233848391.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/pifm3bume8rg7ep61q5fk1sqo6/77899258942.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/funetogavixa.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/37864881320.pdfIn PDF document text
    • http://yoron.net/up/files/40069348344.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608912371af09---28141589527.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160819b5db5803---puvogab.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1af1af00---63241430608.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_off0000f83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 10936 bytes
SHA-256: e9f553468b301038f3c17c4967784ddd1146073e0b0537c3a49f7e890b36a21e
font_01_sfnt_off0001117b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117B 17560 bytes
SHA-256: a965fa531a8f223ab2636c97fd44f2f9bad9e784705b32d8fe7d4ffc7a706e3d
font_02_sfnt_off00014006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14006 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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