Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c666c94a92d0fb8…

MALICIOUS

PDF

89.7 KB Created: 2021-06-29 15:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e17ae992aa8bfbddfca2caf4953f3f06 SHA-1: cdc91c12e36f7a006293c38068f8eb377eeda83c SHA-256: 7c666c94a92d0fb842952ecb4e44fe6119cf698a544f9e31b7e6ab617d08f003
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely exploits vulnerabilities or serves as a phishing lure. The document functions as a link farm, containing numerous URLs pointing to compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://drafthe.ru/uplcv?utm_term=eating+white+rice+everyday PDF link annotation
    • http://ingmontagna.com/userfiles/files/rafadekuzozuniv.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/nhqgih88e220ae9strgf73l648/mugawo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a7f7624c5fb61222338924b22f768658/62601970715.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/u83f1ec7qjngjpl0oqrf0n0mi2/benafebubezepuxilek.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca878a5045---24625213485.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b075a8c497e---xugisogifigu.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/0b0e2778d0a2a8137481b208aa762474/lagazodeloxusinotozupe.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/ea385c8532b80b4aafb97316baa84a69/58470642896.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976ca02f658---26692584500.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/89473812324.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/2cddql7e0bmsegkio6s1f7a1c1/rojobemafukowotevur.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/39861626685.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9932b3ecb---23175433997.pdfIn PDF document text
    • http://freeski.hu/freeski/file/zaxufubavumosotoxisad.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c33fb07acd8---61461491411.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a3e67038fe6637baafe995f95568d495/xisolurititegusu.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/jaregager.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/xalon.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/b9ec28f19150c911470e8ce024e4b94d/tiwabedesodaj.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/bumedodiwitedav.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c470d1d559---rizaromovefebimomoligesi.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74379b4ee9---dugunaxezab.pdfIn PDF document text
    • http://abnicum.com/files/file/pavaziwuzodiru.pdfIn PDF document text
    • http://abnicum.com/files/file/40456607194.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e9605ac5---zovirake.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6cdb43d0---zanokukapiranubadowabati.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_off0000fc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1D 17060 bytes
SHA-256: 95c1e24f3540070b18a712cb1a5b7d604666b7330baf5a19c697d943b4cb0051
font_01_sfnt_off00012814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12814 10564 bytes
SHA-256: 2d143fd5c33e0fede2cdb36c97f8472ea2c5578d0313cc13d5627aa3ef17a31c
font_02_sfnt_off00013ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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