Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f8c9569cace0a7…

MALICIOUS

PDF

69.3 KB Created: 2021-08-17 17:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 383821c4b923049412ca2f8d9e5f44a1 SHA-1: 220dd4445fd9ce9eea3254d6ebe3cfa966d638c9 SHA-256: 80f8c9569cace0a7921c87879456c42091705b62f4942a74560cfb4a8352ac12
154 Risk Score

Malware Insights

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

The sample is a PDF file detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites. Some of these URLs are hosted on compromised WordPress upload directories or disposable domains, indicating a potential distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7779

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://mimpiindahsatu.com/contents//files/sexirubofuporipofuteg.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e72d832bf---5984150705.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/segegar.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/p15h26i4s324c49kq8t2qh53uf/mixolobafoseletaparodelor.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/2c2cf502a98ef0c4d2119ce0a592dd9e/99020095971.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe86ea7a2c6---penololesusurigupaxogetu.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/1h7765r1auapp35i2ohek73rob/20662839789.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8565d3a01b---ridizakamolon.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/54231474879.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/33430939559.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/4a4e99108b02409cd6c6724bff6db8d3/63261162168.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/0ec7b0991dabed588ea3a6391e872903/ratagukoxerejekogujazo.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/sonusevetavijoxar.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfee26092---gibifan.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/80714760433.pdfIn PDF document text
    • http://nature-revive.org/files/file/fonabevevukejat.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/44204836662.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/wumajovez.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/dulofoxedunitasubifisixa.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc652e9102---92242196419.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/18415401470.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160703e227ef80---72596852791.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+connect+logitech+keyboard+without+unifying+softwarePDF 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_off0000db04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB04 17352 bytes
SHA-256: 9787886110379f41bd389799bd3d1e259fb25a9d07f836fdf19e5824de76888c

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