Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adf838a3982d713…

MALICIOUS

PDF

89.7 KB Created: 2021-06-28 08:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b2410f53206c74a90a2adfb63f8db44c SHA-1: eadae6bbae768486e010fd0418448e1a95705adf SHA-256: 2adf838a3982d713af854b51d0410b8e6d876ab47b5795e2474feda6ae8e66b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=job+responsibilities+of+medical+officer+in+phc PDF link annotation
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/qht5iv0nfk9f9jhd4ig6s8f6hd/22077330010.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/cdd88f19d181af475cc3b4f31a70f506/60066896266.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b185fba24405c52e6f60a6a391d27d81/27738516319.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a01db8dbb188fe44fc556316c485d50c/12927195996.pdfIn PDF document text
    • http://brlairport.com/images/file/loladinoguvaveloxapub.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/7ba0552e4868165225a0106e64eabaf4/mufulujuruk.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/tubokekamesagabevas.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/mq6g1v5n9jl7non9auf828sfn7/vemaposuluwelaputitaje.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/6467212686.pdfIn PDF document text
    • https://magerp.org/upload/files/xeravafanizolerose.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160948acfe0747---57638007114.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/korewikosisov.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/jixakewagikoromev.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/89237394075.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085103cd0702---zawoseguxagilax.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/1rse2h37c5iek5u6fupcsde6r1/bikawisoroz.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/3315852377.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/jacc8kgjae184c9rit36jah1j7/bewefaku.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8a77f34ce---41713876739.pdfIn PDF document text
    • http://93564497.com/userfiles/25412449915.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/nawasadonagodixikotutedop.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/baxug.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/zokejakeguxenokolawe.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/d9a1b4ed82d4a113a89cc9586bdf86d0/97252107198.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081bbc385c16---nenajenetolesad.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_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 17440 bytes
SHA-256: ecb7cee63d528e365b22c812183728b6f971800361f73c2e8520896c7d21d1d1
font_01_sfnt_off000127c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDA 11016 bytes
SHA-256: 8ee2dc0eb61d57cc7001e7f0fed0dc968e2cee8e64ab0e0cc3a62f069f22b36a

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