Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d890157429b5328…

MALICIOUS

PDF

84.6 KB Created: 2021-07-19 15:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a947a6e33d5b9745ab1c0dafe4c2b174 SHA-1: 84817b3626f1a6c43e10b2dbc62a1addca814b41 SHA-256: 5d890157429b5328fb22c168cbac81c36cfc97eda5af9f2e9e5a75c0d8a6199e
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

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 http://gwardiajuvenia.pl/zdjecia/fck/file/fefur.pdf In PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9681e6ee8---88707304917.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/2dt4i9toj82tj1v676f6g8q288/sisosawowoxe.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/93930122489.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5318b3a52---xezolepakaxekovubewabun.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87475983b---17527759460.pdfIn PDF document text
    • http://sgpeo.pl/users//file/83897574997.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/95208a73387e91f5c2d02d48ba4ffe33/beridiwipak.pdfIn PDF document text
    • http://waberry1969.com/clients/877040/File/25169922896.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c16f4bafa6---torejelavobemaloj.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/wuziveli.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717a0f0f22b---vofoxivuboxodidovuz.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/37184910631.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/sisiragagatixotan.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e223f2b4f18---59293133132.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/bofizevejilenodera.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d180077765---99602314398.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/mmgdtt0r5sgr2dl473rtacv522/mufifoxemon.pdfIn PDF document text
    • https://artenika.pl/fck/file/18273873710.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3252036fb6db98d9bf31cb095e19d2c8/sadapelu.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160de877b0aa3a---nubebuwezuruxulebatozefub.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/av4hlmnigdkah9iohlji91dair/fuxajag.pdfIn PDF document text
    • http://didopack.com/files/jexelezisasugunomok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=elements+of+communication+example+situationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 10724 bytes
SHA-256: 64fbbd3e8830d8fe7942428015439b23443a8c16a8bde6315e792f48ad895653
font_01_sfnt_off000115ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CE 16824 bytes
SHA-256: b52e3f5f00beb81ca2aa716ceab832232e9b0ee2c3fc242de7c3f75200c1cf5f

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