Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f979b7e60b23c4…

MALICIOUS

PDF

85.4 KB Created: 2021-08-18 12:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de19ff04b5f3741bc4dc3972b65534de SHA-1: faa05c7bba0366180a3e10a572fd3a8838393460 SHA-256: 00f979b7e60b23c495308f58ce1ffe0a1e2105235db5ad0dad248e1dae7f70d1
124 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ClamAV, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The PDF structure and embedded links indicate a likely initial access vector via spearphishing, leading to exploitation of the client.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4489

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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/fb26fa64dcc1af9aacf4a0ac2d136d73/kireluxikepigimozup.pdf In PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/tiruzuxofinov.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/fadisinosexamaminuvemejes.pdfIn PDF document text
    • https://areicon.com/images/file/40239006445.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/rudujejogolodu.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/0k0lbj1g8p5q5ms0o7hgbi2us1/dopupowifigoniva.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/suruvozajodejaxipolikovuk.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/16997852194.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ef59bec6f---kinudoti.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161183bf66eba5---84687318251.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-08-10/images/files/49952129561.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b5ba17bb6---zozokizazusutegus.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/kisosotopewuzepetu.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077547ba3728---26096776811.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/62068870422.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1342d7ae17---24977920908.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/lshje2in44efsm7o28dhvec202/50553755791.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/xilazizoxesalekif.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d66e77f15---81414514488.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/60904578708.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/vibulumekoxatezot.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23b5fa423c---91177072201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=sulfuric+acid+sds+merckPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 17724 bytes
SHA-256: 9e24e92a73cc02c529d1bdc4b65d17469bc3e2abe005ebd2f5e39c8c7799a1ec
font_01_sfnt_off00012844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12844 10580 bytes
SHA-256: ce6dbf966e2406365c27cb955e7c5d6fce70f6b15415d7599562a1fc576fb32e
font_02_sfnt_off00014066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1