Malicious PDF — malware analysis report

Static analysis result for SHA-256 44774ceaae115888…

MALICIOUS

PDF

58.1 KB Created: 2021-07-02 12:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 00df41a008649f25cd8fededa0076c47 SHA-1: a2e43c634abf75b46a988b70de0516832193227e SHA-256: 44774ceaae1158880ba6ab767b61f05d5207c48c215952d29d6b42186e9992f1
124 Risk Score

Malware Insights

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

The sample is identified as a PDF containing a link farm, with multiple URLs pointing to compromised CMS upload storage. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3715

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://conelser.hu/fck_uploads/file/ketokolatugikerasajuke.pdf In PDF document text
    • http://tubietelbar.hu/uploadfile/jufaxoxugoduwuvik.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/zewumokogeju.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/26335100133.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2f800081a4848a972d1ac2a79d06cdff/86465495268.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a488e876b43---loweruxasesulexawawirezis.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/66959524022.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/jukopu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a16cdb02ce3---belijenaveruzivusugide.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fea1339424b622fe7efc545ae961b01f/96012114112.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095abad1fff3---50588827528.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b0ab5442c---70728902676.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6e02eb6c33313aba8496bcc4e438fec0/89001592327.pdfIn PDF document text
    • http://nature-revive.org/files/file/redozoxixovujafojonal.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/k5chg7f2uu727pugcdmb55ese2/tamafululixujoxir.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b05bc61523---nifijunajewi.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54e526bf28---mifotiziru.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/ganabugenifikazirozit.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9867411a7---xowowapoked.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/825179ab9bca8acf52d7bfa9c235aea6/3304365418.pdfIn PDF document text
    • http://bakoca.hu/files/file/mareniresunagimuvezedep.pdfIn PDF document text
    • http://446888.top/userfiles/file/nitasapi.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/94946639201.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e2c4b26d16c2a4b49e021a064ed3f422/92302986346.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/zebolesafeketowej.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vowujaridalemusidave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=different+types+of+sampling+distributionsPDF link annotation

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