Malicious PDF — malware analysis report

Static analysis result for SHA-256 1077b61bd6fe6c8f…

MALICIOUS

PDF

42.0 KB Created: 2021-07-10 04:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 491eba4119dbcaf5836c6fec339a1dff SHA-1: 9b6cc38b7910c08851e7c3e053291943993cb97a SHA-256: 1077b61bd6fe6c8fad4d7ae687abc7a768b581a2861375729aa70dec9ef67d9d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7348

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://castrolmintabolt.hu/images/upload/file/gupepo.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/40cfcedb283fbcc175ca550e5a5346fa/57068646352.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160872f681f978---7005908029.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608156214b58d---wumovudulem.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608214582f566---tujabuxabupapapizadulonen.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b8a2ca9a---worepibefokirobupimewigi.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/82441095515.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160aefb929fa79---37006493588.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5811d6148---tuposadodunoxerivipuni.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0773e3c9---31551785088.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/1273000953.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a0cd3011---29094359708.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/7efb3b675450a7cf6d36fb1ccd2cd511/lifeb.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hev2ohsc45qq77s3gmbl2nfbkh/sifewit.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/weredefowepojitukozibag.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f51310dd0---11909827078.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/37394095123.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/3b2d4f564e321649b78483524adb89e2/57244562667.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/pepusob.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/tuxivewabofilemudimotoz.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/wutus.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ug69f28q6osf14ac3sa5pqrbdt/kubegotowiw.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f01c5d6c7b---7116996689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pedicure+with+thick+toenailPDF link annotation
    • https://mediaget.com/userfiles/files/megazetiwaxogumatevib.pdfIn PDF document text

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