Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47911d515ae8584…

MALICIOUS

PDF

80.6 KB Created: 2021-07-05 06:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 124a8350269f2bb4399c1bd4018d36fb SHA-1: f8628ac733b692dc60812ca5a3e2bd1e0e2fd1bc SHA-256: f47911d515ae8584b43bf9133d111af36fdbbfd7f95e53423bdd32e7f6343fed
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the primary attack pattern involves luring users to external malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://huntic.ru/uplcv?utm_term=pyrethrin+and+cats PDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e2eeec02c---kumopewuvanipakeweweda.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b1bb6047ac18e7b924fe8ba8d3ad4427/47555242415.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/logigalomabidomu.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b520b9050---5724901799.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6fb7f5f9---losejaxepodaraxura.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/38060225750.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09c7511fb9---tonuzuromekepuzubedu.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/jofuxefojotikafonojo.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c41f92d8b40---8038247946.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842fdf28e0---pibumasel.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/2kfu1nsvmmrbp7ukjtig9tq411/11175096629.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a5c99f584---27758371346.pdfIn PDF document text
    • https://selltoob.in/ci/userfiles/files/63737660475.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607312b746143---tuxomilon.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/sadigufomipurodobebu.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/kugiputoma.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/80900671387.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da159bcd1---ratifenukelu.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/85384923993.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/63588040867.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00b9b11ccd---89705062032.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1528f9577a---solotimafutevedojamede.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16075ffa4d4bb6---baterinewopuwomima.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_off0000da6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 16796 bytes
SHA-256: 806b5236a81b42ac5259ae0edc23165b235c80febbc74842a3f73f2f14d9df1b
font_02_sfnt_off00011de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 10416 bytes
SHA-256: 172c0fc0c03fe5e80cd6bdb652cc1db8b0b17edbed54d4f2b8d08e58fdc539ca

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