Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5a49eb775759a5…

MALICIOUS

PDF

85.3 KB Created: 2021-09-03 05:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c1d1fa3b2bc2d4f4e89cdcc51131db6c SHA-1: b22746b0f92df8e9ab37b2f638b50082f370677d SHA-256: be5a49eb775759a5b3dad0558018f3c940915ff461fbc8a962d6b9a1da0e43c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://huntic.ru/uplcv?utm_term=hks+turbo+timer+user+manual PDF link annotation
    • https://magerp.org/upload/files/ditodapaduxulukub.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/falemibumi.pdfIn PDF document text
    • http://landia-print.com/pdir/file/debasibe.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/0abf94f974e26f9d904803e599c3b5e0/27548902877.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078322019530---wuborobelir.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdb529ddc0---pukexaxerara.pdfIn PDF document text
    • https://aashianarealty.com/file/kapodunududamijex.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/27940022439.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/oom0kma38t39p69eosbv9gia9t/77146529034.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab94abe07f3---33486234066.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/53a21ea1295a4c95b1e42416ad1e415c/98283038523.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fbced5aee---luwesanupagavuxifegetikok.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad4f7303e4---29638983013.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3e82487fb20653e105185e6bb9b478d0/ramulifudewebiwa.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0fbd18cfc6---20647553150.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/kofiromokinegulalar.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/gubovifasenumopeni.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/51149166180.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9dc669653---8405503818.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/dutetokamotawoseg.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210531032318.pdfIn PDF document text
    • http://brlairport.com/images/file/16451573256.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/junasujokiluxematonezeli.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/33673557963.pdfIn PDF document text
    • 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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 10592 bytes
SHA-256: fbfffdf6ad29e051d3d7a1d34be8b63d0e5793ce916180654363aa97cdd8c928
font_01_sfnt_off0001004b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001185d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185D 18276 bytes
SHA-256: 5d18691d4516ee6a11979ae257716e5c945364157ce91f68edfd13de3a94c652

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