Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2ed7e87c3927a4…

MALICIOUS

PDF

74.6 KB Created: 2021-07-02 12:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9dc473af2e6ed754c0ca5f149dc39d88 SHA-1: 240a3a9ea0d08d5ff23712879f7631d10d3363b2 SHA-256: 6a2ed7e87c3927a4301fdc8203877eec2f8ced0a1906b7dbd511396ea6f2dce5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=a+metallic+pipe+whose+internal+and+external
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee7f73e16---botuvuside.pdf
    • http://cs-golfclub.com/ckupload/files/80721162216.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/485be5aed04ee6af149bd682be102259/81576286961.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076c324a5733---pagateziguguben.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/4cr43r9s5bp28hba12bo42p6d6/redebesokowugaj.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/21391020b1e68aa03395ecda1d8e1542/jizovuvexodosopefadirep.pdf
    • http://juha.be/_files/file/numaniwevojiru.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/sizolale.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e17b551c5---24056798877.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8e8d80f4b9465aaa83b7ce01f4aa8a51/tefabiwudu.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c45c98535---29616001577.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/b960dafaf9defad98eebe929df83a09d/sexenawumup.pdf
    • http://seoulsquare.com/userfiles/file/gipijabufavaz.pdf
    • http://kulturazebrak.cz/userfiles/gagixipodososufax.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0cb92ea411800467407c77bde37ef594/56151386881.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/0419d0c64aa3b7071caeefe557baf56a/dinebilivax.pdf
    • http://cs-golfclub.com/ckupload/files/sekikozeremu.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/d9e09a99ed765381a9e479d75e58a4ab/puwitas.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/s4rnegbdptvavs7r0vveb3padg/88965543885.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e8ba067fc8f8dfa2a821d4f48d413c4e/64836383064.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607854fe22089---kufesodegukudu.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160708f7943e55---6863959646.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606da3b626321---ralikuxo.pdf
    • http://serdceprirody.ru/userfiles/file/88468903986.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc85.bin
f0bea7aa3448183c7473c942a1c3333c7a9142de9f9ca2700319a8fd983e15bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC85 17904 bytes
font_01_sfnt_off0000eba7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 16792 bytes
font_02_sfnt_off000103be.bin
8cf2e9e96a4b7f72a0520fc2846ed10df662d16df421f7d7d4a0081f7439851c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 10948 bytes

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