Malicious PDF — malware analysis report

Static analysis result for SHA-256 686096dc89c70bf0…

MALICIOUS

PDF

95.5 KB Created: 2021-06-25 23:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4385bad98ed63425a1a8c2146cf54d61 SHA-1: b8cee47d51c9ca06839807211bce56805b614b21 SHA-256: 686096dc89c70bf06daae51b1576fbf95bfd44f46a29ab705fb6b3db2e8ea971
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://coretry.ru/uplcv?utm_term=you+get+stung+by+a+bee PDF link annotation
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbaee92c39---62517241829.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d7ea6272a87b90de685ececdb382843e/sopomodejabiz.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/3tovma4t8g3d9u3do42bkbrhjc/23009833818.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9fbd7fa2---76642496855.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160821835a8b03---wugidokupukiwulum.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d60ae3103---89265128497.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098630a0a235---82385327709.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16086c2541b528---vasope.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec69e9c0b1---nerofuwoditi.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/07urmagqsk19r90jh1eai627sq/68557227651.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/cv0bqku7j55bnl907fgbcn2a1g/raminubonutevi.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/4nvo07guk1l41l2rg5vgo7t2tp/37585939489.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/1d9f1dbfe763c101528bcf29039ca26d/tanudamivew.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/38963923801.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a4de199cf2165449b86942aa20521df3/22192300265.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e735f51bac92130365a73f6f14871124/kirifugalopotigoral.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/84a3b265f1d840d2806f0307a5df66e2/62908448504.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc648bdb2---15474179152.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098719b08675---werazedab.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/romexemupabasawibubuf.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/5c51f461f635c38217e79d88daa18c48/waximawo.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/kollmn0mms3umk321gsvpa33b1/tuwirezefeloliwafoweperor.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021061814573670554.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/bfeb6722b8e0c313b5ab10891fa7053c/loxas.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/guvafeduvuveti.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA5 10380 bytes
SHA-256: dd1623abe8fe8715887dfc7723ba973b97254f0e2c33188742db9a19cfce52b8
font_01_sfnt_off00011557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11557 17300 bytes
SHA-256: f37bbe9c728ea231d54fa20738ab44f44603c295f3071ce279c58fada8ae77df
font_02_sfnt_off000142a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A2 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
font_03_sfnt_off00015854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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