Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2577ca83ebf207…

MALICIOUS

PDF

78.0 KB Created: 2021-08-21 13:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9f62eecc953eeb57ae6ca48c9ac04635 SHA-1: 616bb3c1f542908595acb86fd0089c8822e94928 SHA-256: 2a2577ca83ebf207240a256239f75f2cc28238420e3334b821e746f2476276f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites. This structure suggests a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8512

Heuristics 5

  • 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
  • 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://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c0b1186fd---1679356895.pdf In PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d5d4c6a54---xajidepodetitef.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a93ed188187016ab78a994d747ec6663/42406872025.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe7872cb65---vufolesuxamudavexiboxosop.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/lgtt2lp72smsr6pan6c6rhqc15/3574263023.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/daxinak.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/0fcb8fedeb34e2f41c376223194c110f/janujagobedakiweposisa.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/bf89a1372222940494d975d7eb406146/nalijemogozuluguv.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/efd25e2b81f3c5ca4568281cb166388e/rifinijadisedota.pdfIn PDF document text
    • http://artospace.com/pics/file/luzolefutududagiko.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/21644778599.pdfIn PDF document text
    • http://attlas.center/userfiles/file/41225162882.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade65700307---fifepoxevibediretowo.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/7b89ec052dda2618ab49c86568bbb94b/17837189837.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/43414517970.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da423f045bf---84435537592.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/pepur.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/16352385067.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/66124733264.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/ruxozapoleseni.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081579224538---3788315298.pdfIn PDF document text
    • http://w-mill.jp/images/file/zopejugabaja.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e000b3f6d102278ed2c967b1d11a79f5/44807529340.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/vorubukefawetutumuton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=stellar+data+recovery+9.0+0.3+activation+keyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 11072 bytes
SHA-256: 4aa99e75e049d7e04cf3cf064838f30310a921d9128e96bf487b2150959dfd5a