Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb5cb8ccbeda5f7…

MALICIOUS

PDF

74.0 KB Created: 2021-07-05 17:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9bf0053023f2748a835be9b442e34cdd SHA-1: a0feab0a95f97a053a597a237d2ad151d33b68f5 SHA-256: deb5cb8ccbeda5f7d67e79242ba3e7c770c0d87f3024374bd6600abc2cc5dbb6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6407

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://iamtimeshare.com/userfiles/file/7474116690.pdf In PDF document text
    • https://zlato-eu.cz/upload/files/fuloxapux.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b28ca7783ad---53772679303.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2e5339e42---pupujov.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0685b3eb7e---43184302384.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5d2e410f1dd77940cbda1d0c028577fe/xorusewiru.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/xuzanixukakegizujix.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5255e79bb8106d79606ae9179a69f5b9/ligasipexefo.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/2d737880115cd5a503b87e676c8d2dda/51480917204.pdfIn PDF document text
    • http://technocom.pl/editor/file/belufujananixisakemanaf.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb6a9197fb---47636140339.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d08117d1db2443cd5e06839199ab7f1a/20603749897.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1289a979b---89467640937.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d30eeb2a1---gadufuzegoxebe.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/kozalubatawer.pdfIn PDF document text
    • http://abc-tel.ru/data/File/jabiruzenododuzuva.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210514194602.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/32782438960.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/tozabumokafo.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/xopovazoxu.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/71747189087.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/raned.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/05o0jnc2vh75ifqsgo3l92rdp2/nefapizageda.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074aa5f3f944---sidoratilenizam.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kf9o8d57rdm4aonhvrolm8hqu5/tiduvifozisusimowinile.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb8b9dee880e1c3a7037a0d7ff7f5800/rideje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=born+meaning+in+tamilPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 18212 bytes
SHA-256: b0754e948fc07a4e3cf1b62425058f5e3cbd5d1424adb62d07dc42326e399bbb