Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fe8e3b60dc6d32…

MALICIOUS

PDF

71.8 KB Created: 2021-09-20 12:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d74ff09007d65055a486792f1b09d87 SHA-1: f2e2fbdcc30161ad8928d89008ef7c5a0b63148f SHA-256: e6fe8e3b60dc6d32a0e1b0dd013e5b26fd2dde1ca51146d2082a5161b7025e58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://aucoindeshalles.com/menu/file/15511169522.pdf In PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/9d5eajqioeh0dc5r659hol61u6/56018368737.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/lifarugizojunileto.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/migopimovonuwifidapeli.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d483eee65ace59ec6f94cbfa9da3c69c/lomuwolu.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/digoratiramevizakaxogut.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b85f569bd2---senufizivilokaxitosupe.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/18684013444.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/8861309040.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/kimof.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/boliris.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/11201003155.pdfIn PDF document text
    • http://abwva.com/uploads/files/94037965050.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16140487821cee---63468138172.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/repasin.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/nezivopibexujamigeka.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/47959107983.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/29743021734.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/jawuzapiwil.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143116b239e8---64512032683.pdfIn PDF document text
    • http://prestopc.it/upload/file/7086893260.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/56030357396.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/sudolakuler.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/movetumikaxetivemimuja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=android+make+gif+from+videoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E4 10524 bytes
SHA-256: 1d1953eac1531ad21c82867c0f9cce5d98889c2ee044ddf6b47de8d86b174574
font_01_sfnt_off0000d19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19B 15760 bytes
SHA-256: 3e0440ab45399cb69fd998beb4263405249152a81aff5a3c471c68583256129e
font_02_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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