Malicious PDF — malware analysis report

Static analysis result for SHA-256 b843d2aba6d3144b…

MALICIOUS

PDF

56.9 KB Created: 2021-07-02 18:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bfcd1e6ffe3f989efeee61968d41134d SHA-1: 7ff96a772bf29921714086e0c011f395bbe431d9 SHA-256: b843d2aba6d3144b7dbd10c263209d3356d84d27ecf3b49c5d83c61af3e8180d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it is likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, which are likely used to host malicious content or redirect users to phishing pages. No scripts were extracted, but the PDF structure and URL patterns suggest an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5005

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://nomylo.ru/uplcv?utm_term=cost+of+living+by+martyna+majok PDF link annotation
    • http://suapaiatuipelehakefamily.com/clients/80707/File/11441047349.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1c67bb7412ee18764535f848ec47e5de/kugokuwewozup.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c179d778affbe5cde5deff05e2c436f6/zenol.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077f9acc3f39---bevolemosoledudumemi.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/66295763895.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdff1f9355c---11358684134.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210612142342245201.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gqu8clc8k3vbjjeo63u1d6uv77/kutabiwiwukapi.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a590fbd1d74---xifizimevudugezifu.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d19055bff5427177a37b67fda10f37b6/80513718252.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/17591353129.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd8af40f27---16101319526.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7e6ca871b19d74cd00ecfb871bfac71e/sebuliwenizug.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/488307966.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/78700052096.pdfIn PDF document text
    • http://farmina.ru/uploads/files/28278884121.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/bidakilamumokedowat.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/pobovudusitivexobet.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090735051885---loxunalakuso.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/ludokolo.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/073ab6f4b1658742c1dfc69453b64b95/lebexererufepewexapiguzi.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/poronobebuzapelomipewa.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e50feacfd25299ece46bdbb8be132cfb/gowuxefaxulevasu.pdfIn PDF document text

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