Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c30893de1bca5d…

MALICIOUS

PDF

81.6 KB Created: 2021-06-29 00:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e8a66b0fd18dce0542a84d2a4e7aff40 SHA-1: 8098b9d98aee8bcf503308a8fb713c73a507a128 SHA-256: 77c30893de1bca5dfcf17bfa5a7075732a6c0a468dcfced2299560fe32c23cef
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to act as a link farm, potentially for SEO manipulation or directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pui-vital.ro/msg_media/file/98925767474.pdf In PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e3a03ce09c864717e01716e905842102/nosowitatadosa.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/39547106555.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ed8c6ef21---tajajesadufeva.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/q72eif63tv7fge02f8vi3us3ee/kusafaganibanisop.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac7f15afef---98108824952.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/mk2r6oue6ve4ern40dr49i2o6h/74917160845.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/duwakewipuranifiwevab.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074707a4c1c9---28889093683.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///7732146939.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/10381918400.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/fagebegekuzegu.pdfIn PDF document text
    • http://dzbnf.com/upload/file///woreme.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080b50d6f6f9---631517662.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/82466360229.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a988c944bd5---pejodajejejedavuju.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/93234252906.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210627215446_04tu2m.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/85972546930.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/245c46e01b0c437f79119cd3ddf81b57/62610814826.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe50a6ece7---gejivagodarivoniwe.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/07c4cf3d8573895934555de71c0d33a7/52708985732.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/julijodidefumiwupuz.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5807c345c---bemilikikixibagudig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=types+of+erosion+by+waterPDF 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_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 10608 bytes
SHA-256: d5d99c5ebbbbc9254d539a8dfc860ddc14f147d24d0d61dc47994dbbe7689270
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 16964 bytes
SHA-256: a1d83edb0619d7abad6898e50ac55256a771fe12d85304b4f6abbf8931d8912f
font_02_sfnt_off00012113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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