Malicious PDF — malware analysis report

Static analysis result for SHA-256 493bbaaf3c79c857…

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 21:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 508b96672b48b07265dccc254f940b60 SHA-1: a2d3fb8d753def66c20918a22fe6803399198d95 SHA-256: 493bbaaf3c79c857c165e2d80fa62775a60fd79d3ad01e0124c9d939a4b5f8d8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ketchas.ru/uplcv?utm_term=knee+bone+bruise+physical+therapy PDF link annotation
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083991281b66---pekatumisonikiworuluro.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/papem.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/23486541269.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/15119251226.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/82668916507.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/zipixomubodituzemalikizus.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084bb51cd01b---balafukivumez.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/lobovax.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/74446340208.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed875e0e33---69436802605.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/76850319418.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee21c6d5a87a79cf244f79e2520bd47d/93968109382.pdfIn PDF document text
    • http://www.bash.cl/media/file/62351688163.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d40c2ecd7---78371265954.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/lukujaxuwabidadig.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/e0b9c4d1867314824cddf039f9ac4717/68770241468.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070472ad307d---34072032023.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb616da40c---ladogozifapasapag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea57b5ba0---40321701610.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/22296847083.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/gcdlb4e93r9jt5m1frm6ggela0/rixid.pdfIn PDF document text
    • http://abpaluso.com/upload/file/zuvavidirawedefepapanulaw.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-30/20210530044400143397.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/wajavomolojutebunotutowi.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_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 10816 bytes
SHA-256: 2baf4293212595a446f88a5f0089c3f3774700e3ba20dff2e78bdfb9b758b3e2
font_02_sfnt_off00011d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 16784 bytes
SHA-256: 70b6052f3536dc1dac04258904fc1a70af3714454acea875fb3b29682e8bdf8d

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