Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ab836d07bcb0de…

MALICIOUS

PDF

75.4 KB Created: 2021-08-02 02:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e2bcb3cc43bd62a14c0d260b6cab1396 SHA-1: b324a047dc0b6068e62fda36d17cc94302df15dd SHA-256: 27ab836d07bcb0de14a4ca7e96dffd971f08a3ca93b13c991f3feaa5e23d6c91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, which in turn host further PDF files. This suggests a phishing or malware distribution campaign leveraging compromised infrastructure. While no scripts were explicitly extracted, the nature of the links and the detection indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8400

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://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609440f28b426---63798676397.pdf In PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/dlorflihomurssg16fk9s0l64o/zevazakofej.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/nesijedabejopuw.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c6f6feaf3daeaca3cf4adfce2f542788/1253441599.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/58819296842.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e89df15b25---puwozasonijumabekivovubi.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7t25k4it5qn4rjvd1ua2mh5rvf/jaxivesadar.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/1380602598.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/bejesulaverodo.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/6b3262c1c1be14d4f719e04c17051f0a/83049384359.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e80e2853063---nurogeniwipodewojovuwik.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/58804101958.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/18661976756.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f84b17524---gumolejevutetepipawu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rdn0jlbvjar119q1jvg6jh5fa3/ruvusewen.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/37376470903.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f324c4c449---76191898029.pdfIn PDF document text
    • http://lblussana.it/images/file/84438430892.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/94269015539.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/75e95b67b445a726f80b312b73e918d7/47704802188.pdfIn PDF document text
    • http://superazs.ru/images/news/file/93202417669.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076580ea842e---57039736515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=what+do+you+discuss+in+a+project+kickoff+meetingPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 11452 bytes
SHA-256: ba211927e2e6984aa7d905eac7ec24f58c52c4f827c969c01bf1aef4050f6000

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