Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f4d1bee8b15428…

MALICIOUS

PDF

91.4 KB Created: 2021-07-03 00:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6b5efb6c36f42d90dc2e245594d81df6 SHA-1: 28446aa2d811c97438821f97e1212a74f9a428fa SHA-256: 82f4d1bee8b15428ebb253d058d7d01aa58931137c23734bd02dc68bfd9e504a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to compromised WordPress sites, indicating an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5891d4b53---zukobonazelerewerinazof.pdf In PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/8tm0d7e5l46ogiccrfrr9pplmt/fonofanenuritamubififino.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0df1c3982950f0830f57a2fe1898e985/gapenumod.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a725771449f---86707530713.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/16e61ed8bef8382c72785357eb1099f0/fodubukilizoxegiba.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/63700595142.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b27bf145b4f---zejabosutuvafirirud.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/gbk98vm3pqdok9o2deo16n0au1/nugesuzijojizabo.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/zosoxixemopumopazuposaz.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/442b6cf196514619e789969a23d1c36c/rupomejuzuli.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/951931f8eb110ff6ff53da217c0c064e/25373976444.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/37405428187.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092abb23e0e3---xotepalanu.pdfIn PDF document text
    • https://motacademy.it/file/noxawumub.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/84929646817.pdfIn PDF document text
    • http://proxima-design.cz/files/file/30772291031.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/11317518166.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/66f5847660bd1fc54ad7d0e2cb8b99c9/guranowewuneraku.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/5ch1oeam0a38iq0ldara2llq8f/85086347052.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7dee8e19fd441e31c999742430de944d/6494173735.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/kubozuler.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/90163051453.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cda5013e87c---xelavewogumogimewuda.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/pcd9iu8kmpot303j6ukcq1u4h2/tekoliwobesuduzetazume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=adventure+backpack+mod+1.12PDF 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_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 18136 bytes
SHA-256: 02e6286aca694e024733e48a43b905ea73e0dd7a7366c8d216f24c47e5630747
font_01_sfnt_off00012ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF0 10988 bytes
SHA-256: f97ae979ccb359458339e28f7be1636b7e643b82c9d13d377a4374ee4dcaa24d
font_02_sfnt_off0001485d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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