Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb91cb475074c76…

MALICIOUS

PDF

51.6 KB Created: 2021-06-26 05:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8a0ea5a414a4c03eaf55fc83f3127409 SHA-1: 720a8f84a1d49fc30f86953ad0d51cf35917d91e SHA-256: 1cb91cb475074c76c66a97b1f891347ef5dc54b12efe190570e453fa2915f439
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm that directs users to multiple compromised WordPress sites, which in turn host other PDF files. This behavior is indicative of a phishing or redirection scheme, likely intended to lead users to malicious content or further stages of an attack. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6843

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://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/a42c18e388618a702464fa6e7556261c/dezawomezalizojo.pdf In PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/bc67cadc127f6aa6f135a341f7e2b14b/99345875069.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a62faf11a---59056903749.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021531543225702.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/cb5d13baf7bcb3bdfbcf87bae59dfe6a/80679391208.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c21502db861e1c3b1a13368beb145012/gulokajetu.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/d3a10a7d22f98f00e3bc66993efb9afd/rosutilagatagataxovavabu.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/18uo6bs0nbvlcc6ch05ed0ddmo/gabigugiluvimiwose.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/6mh8kea4nco5aqbpftsdietcno/xoxavuzifosaxivuwo.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/19176287734.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/vuxenemeva.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/dc48cd711c0e0ddbc3b5b18fb230531e/danezonuxejoz.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/degulonerowumaloxuzigeke.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/gokadupo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/6eu829tf7r4t6q5c9b0l4a1uie/46389975216.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8eee2727b---fuduxipaxuzopik.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160905129d6cda---luvowajuvatud.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f91c511d---xabifadidoxawavitaj.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2059017c---juwadikipijefifixabigari.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8084155435---34611580841.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c20abe72bb3---jadavukorobirap.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06a991bd9---19461081384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=class+12+physics+all+derivations+solved+pdfPDF link annotation

Related samples 8

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