Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b237c59ed42cd43…

MALICIOUS

PDF

79.9 KB Created: 2021-07-28 08:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7594cec4da886f8aae678e169ad57597 SHA-1: 780b280412a6e8b9b75affafdc697f558db6b2da SHA-256: 1b237c59ed42cd4368955f8625f3b52bf9d9658188557747c339ea6d4524a1b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised websites or disposable domains, suggesting a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://electrogalicia.com/electrogalicia/recursos/archivos/mujadozoxinovilibexeruk.pdf In PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/puwevonufevunudis.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ud0dp9n0penr13rb968ndsi365/56071636501.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160870b3248dae---midekuwuwenum.pdfIn PDF document text
    • https://auto826.com/uploads/files/43696034372.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/44934673217.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/14720997394.pdfIn PDF document text
    • http://clingac.com/d/files/nufekexe.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/23125542214.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/xekavovagixorogemumi.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e965b620e96---rekivubojonokumipu.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202107/1626131361.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/26400604088.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093fce5757b1---duzuloxisefegaxo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bb621f4d345d79327a4313755bf2d2b4/66156579836.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/57059209464.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160788fbe1c96b---wuvupusivitazawajaruwete.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/xakojutirelalolurem.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/p1pehlcvrtoo76qvhk7fllh6k7/68044338300.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a718d35d5e0b971068b50bb6f823a4f7/24313593405.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/3091905956.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/juradelepedudekufutavapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pirates+of+the+caribbean+book+pdf+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43A 11036 bytes
SHA-256: 292224a2e9a1eb0f60f9e9c24b7cc7ad6eb20087e93c58e32e2e388e0955aac5
font_01_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 17464 bytes
SHA-256: 8c9d1568feb6b3b8df008bb15a283ae2662f532589e6789590884394c5735600
font_02_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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