Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06b75ee97fadb56…

MALICIOUS

PDF

108.7 KB Created: 2021-07-20 09:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 497c49bbcfb11aa2877c2f3e3f9af6a9 SHA-1: cd442efb4080ec127c28ee6823f2d07eb3dde438 SHA-256: a06b75ee97fadb56806a8fe76f0d1f2d7c99e862463601404d27472f43130d88
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The PDF structure and numerous external links strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://alatheir.com/atheirwsfiles/file/82310372087.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b470fd29---72601991863.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/68000380707.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1653ec9cf---jixuvezamejisu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7de80a128---raviwapofiketenoxitunezu.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/motakodomesutevadata.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cff24b22573---kapeb.pdfIn PDF document text
    • https://cecprint.com/images/file/80374515764.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/75640275477.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/s7qa4aujqao9q9aguiml2070u0/guvaz.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b74c8e45e27---zemome.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de93182f1da---tevetojebetage.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/f5e825d4f3a688f681d64aaaec97f7aa/bigatudiziranetubovet.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/37754862343.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/66519301651.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/bebirerutisewepomul.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e92c1248dc6---54772386051.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/sa9env81fk2ia50nm490m6fgst/84560309794.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40d5156f02---24887400945.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/709c3df841dae33525de236f64d696cc/75714017338.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/23562431141.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/39732548139.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/1deu3gi2itba1vrrjfn56phcr3/2370550266.pdfIn PDF document text
    • https://dpmceramiche.it/file/39186102553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=that+would+be+allPDF 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_off0001486f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486F 17604 bytes
SHA-256: 4f8ad0f4917a170289d34d953276c8cce62b09450ce5bfc533f33f0025f3d047
font_01_sfnt_off00017599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17599 10168 bytes
SHA-256: 73fc649e547fa9888a094434ddc1ae552966455bd5f69d91a5255cd3318a36d9
font_02_sfnt_off00018c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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