Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbae584b8dc4599…

MALICIOUS

PDF

111.5 KB Created: 2021-07-07 05:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0813c7af5f36eaad37c4b1842df5616f SHA-1: 1c0dd2d679ff86030de46f6995a9a020e00a2608 SHA-256: 2dbae584b8dc4599036b992f9be46907af0a399dc7a7a6b58cb5b08bfb6c436a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. Several heuristics indicate the document is a link farm hosted on compromised CMS uploads, suggesting an attempt to distribute further malware or phishing content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qrbk7pteclucd1hpmmfebnapae/sutowametuguvemolurasuder.pdf In PDF document text
    • http://thamdinhgiadaiquang.com/img/files/29542304472.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/63771771438.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/91900688331.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90ea3dc6fe---93734670123.pdfIn PDF document text
    • http://spencerrandlefamily.com/clients/864257/File/luwesozifufizusejakux.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/84457450756.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/a88b8a4198d0010c962bd818f5801097/66815388532.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/61207380289.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a032720d698---43267763260.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc6476116---pefolupefizuwumokad.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27045de34e---4440167009.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/zaronowumikalulogadi.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/3333611821.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/18203320999.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/nexizadaloxu.pdfIn PDF document text
    • https://isosklo.cz/uploads/zubokidumolelinarokudevo.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/nozopo.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/94005313149.pdfIn PDF document text
    • https://kiameds.com/images/upload/files/jajanivugakowojenumux.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c16005b58---16237121848.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/58858219617.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/suwumonifuf.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/27847663060.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/48110294146.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/vokozupa.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3af443faad---belojapapulo.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/3aafa154d5531fc2cd457e76d79c5970/silemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+lost+generation+by+mike+kubicPDF 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_off00014b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B96 11088 bytes
SHA-256: 52e5ec3d265201b9c81e0b98d2b76c4d375e3ed889e6df8884cee7795fd34f7a
font_01_sfnt_off00016551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16551 19080 bytes
SHA-256: 35477065b55089a596b231503e90d4f363554a791c2bb50b632570dccfd66b85
font_02_sfnt_off0001981e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1981E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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