Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53717de69fc5bce…

MALICIOUS

PDF

122.7 KB Created: 2021-07-07 17:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 46d128380294576131147b4f23eee740 SHA-1: ac15052deb401f95b936569b8e0a86fdd11e9da6 SHA-256: f53717de69fc5bce171296a4b274c41eff5979c2e6821690d9dc843d449a1272
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=wow+classic+mage+weapon+progression PDF link annotation
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/91935289720.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/fivogevakomawazipexamuk.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc66e4ccda---13437338966.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/wubalevizanironujufudawob.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/kfjbiekikei93244cssuqlpkun/jobibanixiga.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160933057c7b58---87781161988.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/7fda3a7ae0874483fad6ba4a002d23e5/mozutilufosepanagidag.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/80348525672.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/54866335870.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/mezuzomerakedazodefarape.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cef7bfca6---bulek.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/19a3ndnhld2n19ln4n5318p3l1/9092844653.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/c4vh77mq0guoff961gc3df3vrk/pisiguwedifadikafo.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/46772e9f46c183ba7ee6777f4efd8776/69587594617.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/32516758927.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/ziruluz.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/61052520872.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f09d1a8e3---lunexulibefaxivolizitaga.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608470ae88f12---8685847386.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/tsps1atcspgkjduanhr56ibpui/mebubibuwawowarosuxas.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c434559118---netafa.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/441anch7mfgdtfrgs11brsaah2/27938043461.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/qhlif3l4fqvq45243v4f4pmkhm/51284523673.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/63719427259.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_off00017e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E58 17540 bytes
SHA-256: 31b269741166973f42e46d1319b491a5e625be9380cab8622fc6f1f6ab8a358e
font_01_sfnt_off0001ac68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC68 10700 bytes
SHA-256: 64339a201fd6dc4b76134e9e1ac828d5f5e5f53f09992c6a99946e1e37433bfa
font_02_sfnt_off0001c4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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