Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1300eba0615c1bf…

MALICIOUS

PDF

86.5 KB Created: 2021-07-04 23:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8a53b12e1abe11c39d91a65adf922552 SHA-1: 74ec04ab2306a0fa4122a361b737255c397b7dcf SHA-256: e1300eba0615c1bfd356e87e12ed15c9c7547bb1a8c2f005e0a0c0b91d8d370c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. It functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites, suggesting an attempt to redirect users to malicious destinations. The presence of multiple external URIs and link farm heuristics strongly supports a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://megaprestige.ru/uploads/files/83425004986.pdf In PDF document text
    • https://ka-base.no/images_content/file/64265011150.pdfIn PDF document text
    • http://billcolletterealtor.com/clients/e/ef/efe7172bdc9c6addedf700543cb5cb37/File/97684256526.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3b7852745---bemolo.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/53594081569.pdfIn PDF document text
    • https://whitesal.com/data/images/file/7659_20210623174205.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/fea6ff5aa16b064c255c84ad6b0777eb/mefukifojilu.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/rosikuxawazomaposevarowi.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cb6f26bdc---58204149166.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aee2ada062d---silesizowejaxiwu.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/likazalomebilawaxazefuvi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/bobegesokejovov.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/9sgincpgos7b27034dsiql99fk/49806432614.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/c2e1be6e2bec7313270eb61a1e28a8d0/39711614535.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839ce877669---jepexegenotewimakaka.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/44cd5e2d3be64966ce6f7b4aebd4e6bc/mutegezagukepefifujagu.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/rujodes.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ccc2087e0---36230757531.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/f5444878bf6a43ca92c1b681a66f560e/rosixepefi.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a697a5ef665---3223794908.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160722588e9b72---40303915816.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1f792ec1a---wupuxakujokoroxifeketed.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/kaduxutapetabetusewo.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/4a5b37a2aad9d241e582d5f7837b4dc7/reluvemewuzob.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/166db711068a52733368f4ab3abd2591/17750591615.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a64b8868d94---18366072153.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=abnormal+knee+x+rayPDF 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_off0000f26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 10340 bytes
SHA-256: 57c08b5161810986be302d7174b02bbf77769013a0f9503332642d9d445c52f5
font_01_sfnt_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 16524 bytes
SHA-256: 4e96ad5320d9a0d61a7ffc1e4fb43132365eb07d950cc693419862a941e5a4f0
font_02_sfnt_off000134ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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