Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60670a669ada7c0…

MALICIOUS

PDF

165.5 KB Created: 2021-06-26 15:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1eb3ad58033865fa13ab955044d2d6f SHA-1: b9e1516af5ac4ee718802955beb6d750bb6658a9 SHA-256: e60670a669ada7c0785b10dcbcc2ca48f4b631751ba4fc36f6993c51dfabd9f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/c35a5865fe36296a202b7fa111da4923/xureruzufarixalojokez.pdf
    • http://ngnjl.com/userfiles/files/muwuj.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d60f12c150b---vuwafofukotireroxoxupum.pdf
    • http://classtool.info/upload/files/kupalibum.pdf
    • http://arniestribu.com/campannas/file/86828716594.pdf
    • https://widepolymers.com/userfiles/file/39451583947.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d65ccd6cdb---feselasivawivawatafobama.pdf
    • http://keyflounge.nl/userfiles/file/88375136382.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/5vroqfk9j1ncvq6ls2ckooq1v5/65666451033.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/30460241a7a4165fda0c99b0faf67f16/tutuwogupikituzelisegowe.pdf
    • https://luyenthitoeic.info/userfiles/file/41745550293.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/cdma4eu22um5buidnpmudthipa/puvunovunas.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/3efe5285729b04c0cef7236a3b833d15/51652485413.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e69ad5bff---kopojajepekuwoti.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d255649d---degisixuputasonivotoj.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcbbf9c0e5---11795428737.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075922c0c4e2---91400123074.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3d019d4b---47272360694.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075cd2fcbf4d---lelukime.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf809e8ba2---kulaguvavubevibimerideka.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/bewapizo.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fd8e95b35ec03c943a7bffd50621e28c/tagatip.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=explained+variance+pca
    • 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_off00020ae4.bin
94cf955ab4fa1a1baf32ce2884cba9a45932db333ed3ff839409c80cc2429d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20AE4 20612 bytes
font_01_sfnt_off00024167.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24167 16792 bytes
font_02_sfnt_off00025978.bin
919f1bc367624d721b2fb31ab12125a2b73dd255637d65187c7543b9c3013291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25978 16224 bytes
font_03_sfnt_off00026f51.bin
d4a641691707f4f19ef21d59a161177698f995bfb45a16e0b67b77eaaf2a70ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26F51 10272 bytes

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