Malicious PDF — malware analysis report

Static analysis result for SHA-256 742ee536e7b4e65b…

MALICIOUS

PDF

86.1 KB Created: 2021-07-20 10:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f312485ddeb73e26a1149f03fcc8b616 SHA-1: 357f0801fbd9cbfa1d91472692547250973e77dd SHA-256: 742ee536e7b4e65bae5b1f03fd8d9758a8d74fff4af3c2aeff6132772853688b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, a common tactic for distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading a malicious payload.

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 http://gps-ambroisie.com/ressource/site-image/files/wixisadabarexigasidudul.pdf In PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gobanesupeziri.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/jisesipugidak.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a427195b1c1---69144414681.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/dumojija.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087ae5a5c056---tigagosawomog.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f514841ff01---zirejilel.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160961418a7aab---vusowelufefaga.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/56754150749.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865898edc2c---39397432137.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/lerodufiv.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/gerudupamoz.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb65bb366ee---90111151017.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1m6k23ekn4tv14136ojhqrjr5n/zadonopofominomegof.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/63070568003.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/642e8221d402d3d7c0b9800e71353881/97665678589.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/afosduak8qkmptos1v8f4rvhk3/fuvubuzagisobesirikoxobi.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/99315894718.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9aca3ea3a---11120879271.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/vasobifetuvawuwonaxo.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835c7626205---jimuvefilusekemazelux.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/2f0d3b6b545582dec83e247054fde94e/poxufemedo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608704dddc059---fekowikatide.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/mavopetegisizutidomolux.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd46d292d---1907386971.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+taylor+swift+redPDF 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_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 15456 bytes
SHA-256: 3ea4f35ddddce7078508c0b4166273d73133464b3e70c4cb2dbf3b3c3a3cac86
font_01_sfnt_off00011aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 10548 bytes
SHA-256: 765dd9aa6923b593f67091a30094079ea634ebd8af2e6d41d10f95989e734836
font_02_sfnt_off00013309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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