Malicious PDF — malware analysis report

Static analysis result for SHA-256 1392e3191a57021a…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 11:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ae71e7a417bebf179c6aeff92e6c143 SHA-1: cc9454acaf69c9a4e2472a241bed97e68c1bbcbd SHA-256: 1392e3191a57021ab8035ca168af5797dc13b777bb70ca3714dc81c815eaefcd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a 'download' button lure further supports this, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=how+to+hack+drift+hunters
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/6e6e2bc94ba27a0e5992d3c72f6b831e/xifat.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d397ae5e990---pofukopomixi.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160705ef13269c---getoguwaxix.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/2eb49bae5ac21f0ec6bb7a8804f934a7/doxizuno.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/6sncnbhnq0lu3l3nud8lguie83/92151088855.pdf
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/novunikukigixiga.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b3676e7d68e---tokexasoribaje.pdf
    • http://boxerdapolenta.com/cmsimple/images/file/manirimiluzupuzojaxu.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608389093b1c0---viwoguguxesal.pdf
    • http://france-ex.com/images/blog//file/jibegofiw.pdf
    • https://audit-advisers.com/userfiles/file/zezujodeze.pdf
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/kugopupegujiruledagal.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075da0a3b583---41575406173.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/dc82885d06e172a4ff7a1a8f38dc002f/46170211438.pdf
    • http://anjilh.com/uploadfile/file///2021051708343619.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/kfrtsr7s57kon4t0j6ignofoej/79826473899.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b94391eb6bf37b28d3a001042e85a587/71782740644.pdf
    • https://demetraproject.eu/ckfinder/userfiles/files/jebopumidupajerefepegum.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/m8fe046k3ju92m204781o0m10j/lorobegevexedaragexizigo.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/9931b1260f2f64851d57bd085cf72ec8/50286820795.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756cb38ee65---62465415655.pdf
    • https://dogathermalhotel.com/resimler/files/danewukidanuge.pdf
    • http://dientrotiendathc.com/media/ftp/file/72947964846.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/2132d24b8ba8c3d03f3eed978118eb57/debinoribunutilupe.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d100201dc3---vepurerojifopurorowi.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160882906f0545---vagatuzatopaxiwifi.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_off0000de3c.bin
9b27f0beff4ec5b8b15cfe9b502aaac29c9e107e6d8270138aeb8b1d3ddc7714		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 2776 bytes
font_01_sfnt_off0000ea02.bin
2457af5bba3550718c3b3b0bb0bb81df91e6ac680ca03f79b407d416e615822b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 18992 bytes
font_02_sfnt_off00011c49.bin
b85aa335ba1d5a4928fa8ef0aeeef8cc6a6859f6766be7f31fbaf81a817f661e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C49 10796 bytes
font_03_sfnt_off0001352f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1352F 16792 bytes

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