Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e4fd4b6e697b56…

MALICIOUS

PDF

109.6 KB Created: 2021-07-10 10:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b6c9008260516494840379da81dffbe SHA-1: 45e0224706eab2bf57bc0ad8c4e9885b83a5ac98 SHA-256: 76e4fd4b6e697b56725efe43acd0154fa50ab10950bb247cd91cd626fb94147d
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, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories, suggesting it is used to distribute phishing content or further malware. The presence of external URI heuristics further supports its role in directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/d858f392e0baaa0fb662cb4523945fda/99800888030.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/5f0a74ac76ef86da9e2cdf7f5343f801/pelikebalimilakelatoxaj.pdf
    • https://mimpiindah2.com/contents//files/6095956962.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/4629e66911171a592978d2d45e9002ca/30450345103.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d31c0075cb---dixumoxikowufuro.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/475d3885398cd30aae7392bf5b496423/82697305026.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/ad38b8b641cb99dff6d99974d719688c/54866259778.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/93887284855.pdf
    • http://stinpo.com/ckfinder/userfiles/files/35852165268.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bd5i4pjk4digq930k7n9u1ml8n/77132344413.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091d0053ede3---finuvulugarereb.pdf
    • http://standartbio.com/fckfiles/file/wawivedasuzedinepamapad.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/siodpdf9vej4uudjkdvi88mpk7/74420652519.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c841a2dc5---revelavesorigof.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160945a1c21b50---buzovupilemomorem.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/550d881658320df73410c1b0fc64a0dd/52245689866.pdf
    • https://nepalonetours.com/userfiles/files/90722247230.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094594ee5b31---wuduvopazaguzovesozunotid.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/7f60a7f9722baec3ba834c16af6d4f3b/xivobaziwavozojud.pdf
    • http://abpaluso.com/upload/file/19480795727.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/de5ce9233c49ecce9f4d364b13dec398/53410683006.pdf
    • http://newdimension.su/userfiles/file/waginopamowi.pdf
    • http://tks-forever.com/upload/2021/06/19/file/38834116015.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fca1b836a---55354482280.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/70e82f8f82791649e5f82bc0e16f78b9/jotikopevulazafizaw.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1801cfc67520e5222bca46f4c21d892f/turopila.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/b994c79da77ca3b0fbb41d60578ebcfe/44108732499.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=freedom+of+assembly+and+petition+worksheet+answers
    • 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_off00014b80.bin
645054c483f0df05ff8687bb76d258c13fac6d4174f4dea5d570d529c715f564
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B80 16664 bytes
font_01_sfnt_off000176c7.bin
d7b4201823d7aaebbc33e0e6e6fd610397f04a402ea4ee2c41c71eb94ec87eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x176C7 11172 bytes
font_02_sfnt_off00019085.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19085 16792 bytes