Malicious PDF — malware analysis report

Static analysis result for SHA-256 1003e19bfe5f2d15…

MALICIOUS

PDF

86.6 KB Created: 2021-08-02 22:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fefd22936daffd813f84f5f811033855 SHA-1: b613fe0f1e31223f3f09543b8a719c64b1ee3ae4 SHA-256: 1003e19bfe5f2d15ae9172273381b1d62cfef34e25e6053f76277b32989f6733
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic firings indicate an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://coretry.ru/uplcv?utm_term=how+to+unhide+photos+on+android PDF link annotation
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/a1aca5abd094952f74d4850b2a8cbde5/8133628304.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/06rcncgk3sdn73pnsl0orkurj5/63273840021.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/8c9b2adfeaaeeee1aec15e4f62de825f/28895504156.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/61faf49e3e1ffc4657a7da790bf48061/37231715262.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/tinifowo.pdfIn PDF document text
    • https://isleo.com/i_photos/file/50822173384.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/tanukegofajemavagisafi.pdfIn PDF document text
    • http://fittbike.hu/files/file/56077874656.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/d22e25af47424ce4f2b6574ad4f6387b/77889990425.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a976bb557e---51370288831.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/wosejisofedokofojofo.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/92144177161.pdfIn PDF document text
    • http://hajni.pl/userfiles/file/lolisujesise.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/jinanawavikabiliki.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/fojitoxuworamo.pdfIn PDF document text
    • http://hanleyresources.com/images/baxufezuxirerureduvu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d59b4c99bf---14036500187.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/78959360973.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/388ca94e3bcd72042c0c1ffe64d15a84/44576081609.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/99716d7b3361e840c2d157e8e65caeca/74789009849.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/95390183656.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/dibiketalipovodanube.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/72777148868.pdfIn PDF document text
    • https://sinarwaja.com/account/files/47695439730.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_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 17912 bytes
SHA-256: efff2baedc128e2bfeb103cfe1d90584a7f7f0a36a173a691e63708646a6f96e
font_01_sfnt_off00011b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6D 10620 bytes
SHA-256: e0117b3599cfe711c2ad507e963a889fdeae6a640041c755684997a927b71a74
font_02_sfnt_off000133a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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