Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a5954f6d03d1b1…

MALICIOUS

PDF

91.6 KB Created: 2021-07-08 01:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db108964bf735a3f58db72a88cab2c8c SHA-1: bf0d19b6281354d9b6800258d57fbc52bf643b3d SHA-256: 58a5954f6d03d1b1433c04fc5cd5e1c291decd320d96becd1ae1bd8d6033a031
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://inwebjor.ru/uplcv?utm_term=seated+dumbell+side+raise
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765993a300c---51538041673.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ae3a4ac2ed2d2b7305d2091a48308e67/98841952596.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c75579b080---xuwununifuvof.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e484a0e0c9b---10229325543.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608569870acfd---loledolisefatusivawopugu.pdf
    • http://alimentosldm.com/userfiles/file/vusudaxumadakosidomoxog.pdf
    • http://rockpapersun.com/upload_mce_image/file/76126913824.pdf
    • http://etre-belle.su/images/file/fofawegasugapogewedi.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/287978a9040ef4bc2bddf03dc0632c54/paxekogenemivipovegekozu.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b73d2d2b---zaneju.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/fa975619037dfebceec18ada875c5d61/nagipereji.pdf
    • http://manixcnc.com/ckupload/files/sabolako.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e676342d9e---fefan.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/11efe82297e57ea292651a405082f498/xupikivikudetalusakupib.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/p414204iaf20s6eqdttvgedau2/jifuzago.pdf
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/milopezibupujifad.pdf
    • http://mwflower.com/upimagesfile///fufozumaviresekuma.pdf
    • http://blueyee.com/upload/file/111423187155.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/nuwaganurigejegovig.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/s1dvneme5gn7gghtm46nmlls61/lorufeju.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb15.bin
ec8a85d2bbce7f80f8d88d32faed512bf4b431f2257a483a05674aafdabc8a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 10500 bytes
font_01_sfnt_off000102ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102EF 16792 bytes
font_02_sfnt_off00011b01.bin
c52627d8a4ec60fb8d8c98f743fa28fdf2016c93347d0d4859bf544c2262b86b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B01 17536 bytes
font_03_sfnt_off000148e9.bin
fdc3f250e16d4eeaac0151c08e1678493ac6cc67090af3137bc700c4cd553891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148E9 16348 bytes

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