Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cf968ac88b3e85…

MALICIOUS

PDF

92.7 KB Created: 2021-07-07 13:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3084882a560bc97881238298f126010 SHA-1: 45fe7808c81b366fd13b05e38b929c2d36588cd2 SHA-256: c2cf968ac88b3e85e8c822e9a942b2cefe0251dd12948d4082ceedbc83957f42
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, several of which point to compromised WordPress sites, suggesting an attempt to host and distribute malware. The presence of a 'download button' heuristic further supports the conclusion that the PDF is designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • 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.
  • 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 http://maidichike.com/upload/files/xexonopobawexi.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ea2916824ca8d09b4f821b4622c85cfb/xufabinomal.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7d870b941---wikununiposilotetotuja.pdf
    • https://badoza.net/userfiles/file/48214685056.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8642f4c814---2707908594.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0ed082a721da4aa0563fe84dbd30dd9c/xosevotolijumajubina.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071818ad23c8---sananunireza.pdf
    • http://afghansolar.com/userfiles/file/vitosonukelonoz.pdf
    • http://praguetransfer.com/files/file/kazotivapadirazalisidon.pdf
    • http://nlureunion.com/clients/33063/File/1492990955.pdf
    • https://sasalidayanisma.org/uploads/file/gopamuzigijoze.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/674737103987e023ec0b05dd31ea64aa/mafofowo.pdf
    • http://etre-belle.su/images/file/rozatupavedotozizobuw.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/iu2f9s6igc482mhdfbaebfp9v3/gozel.pdf
    • http://boilerservis.ru/uploads/files/nugelojox.pdf
    • http://cuoredicane.it/userfiles/files/57441780211.pdf
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/xusapekebosozorugida.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b02bc041096---45598070574.pdf
    • http://www.annaleehuber.com/content_files/file/tiweviw.pdf
    • https://mdteam.se/ckfinder/userfiles/files/sikuloxama.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099d04c47ea3---51751206043.pdf
    • https://syntellect.ru/Repository/file/pagepiruwifiruseduwut.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/7dca562b762ea6c7a357898ffecc421d/4218221016.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/3099b00675c664057ace850d4fe292fb/rugusole.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5063b23f0---darutosaxiluwuxerajinupe.pdf
    • http://www.cenlafilm.com/siteuploads/editorimg/file/lupax.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=de+leon+obligations+and+contracts+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_off0000f3a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 16792 bytes
font_01_sfnt_off00010bb1.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 16092 bytes
font_02_sfnt_off000120f2.bin
2b6736ef91fe456cc6acca55dc4d8e1af42bc40bafd7383db3f208de4a14a427
pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 16616 bytes
font_03_sfnt_off00014ba9.bin
53b107fe107343342e794e481dcc3a45458c0735b850871dbb3ce9896e7d6553
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA9 10936 bytes