Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b6cf73dd4c0c28…

MALICIOUS

PDF

64.0 KB Created: 2021-07-25 12:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a91f54b1877cab8debc726ecdf267e36 SHA-1: 86e2e407d9667ad80d0de2c42d9d7cf843e10a37 SHA-256: 58b6cf73dd4c0c28c428f7506d833749b199c39c2f818064079cf7aca79f3d32
124 Risk Score

Malware Insights

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

The sample was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4237

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://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4ce495715dbde48eb774888824993b51/jufabevuvamutesajuwajo.pdf In PDF document text
    • http://premium-t.info/files/files/disixejajarivovekowukede.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/19129711727.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/efb17f07d6557b51477fb63fe283abf8/noxitozivaxitu.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/537dc1dc9403e63d3f67f6e54ecb3018/sudipupuxofo.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/kifozavazadiw.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/46519200890.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb023220230---67134290316.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/rumepajidusiv.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/98084779741.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/jagugekigumit.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/34938140805.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/zutufodufonefugelutepu.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/b7ffb0c467e3b0de8cee9800d6d49feb/mamilive.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/25205676a980b41037d454c5e2732848/likigifipavawivediba.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607670c4be3cb---6632738324.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/jua8sgn7gfm2c1ep1kruc8m1b9/79426682685.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/14311283825.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d661a926---72127671031.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/29988306505.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/26809773613.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/gorusonezenal.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/d0264709895071e30918f1cb99ec39cf/89894521255.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/nejusigexizev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f368d5f2692---44296122298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=personajes+reales+del+cartel+delos+saposPDF link annotation

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