Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7d3ab5c2471271…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 14:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e200ce0cc0c420962995947f36d29b35 SHA-1: 5716ade53a2b266c0d2cf26ef46a68a8ccb2fa44 SHA-256: 7c7d3ab5c2471271bceacf5d280e46099138b9a9acc11e4c23bf11b77fcb2b95
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms hosted on compromised CMS uploads, indicating a likely phishing or SEO manipulation attempt. ClamAV detection and ML classification strongly suggest malicious intent. The document's structure and embedded links point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a48ec838e---welugolapodinexuji.pdf In PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088452dd852d---misidelozulalode.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/73277353033.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850b6640c72---62627960898.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/as92l5fv1vph4ujg80kdlr25q2/88989521337.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/18717696935.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/adc29758afd0ead7f4f9a8007d0b557e/zixafo.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/6f5391699c63998557174cd77add6230/56536348311.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/70878755691.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608018a2df11c---25156265743.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/so7amj8fkaegfqanpfi6c98uuo/62052548720.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/bozutosewobudoluwisila.pdfIn PDF document text
    • http://benrassam.com/uploads/files/naxagefubugokijovu.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/98684397763.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b11cee209---xarugonamejezikimina.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/83822ae8f969999fa889fe1cb00c4eca/6042816965.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/34ec0d4eec5f76b0d53a43e2fe521cb2/nogexusimuvuzesa.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/85535550015.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/levota.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/78878741510.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091526bd2efe---moralatekefaboke.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/loselokupigadefonodasasu.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160943c62e74ef---75063992635.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/9b8946712739dfc2d08c370dfd6a6342/vakilekujozaxixubixifo.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e75e27cbd---jixoripuzaletumozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+remove+page+in+word+2007PDF 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_off0000e730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE730 17204 bytes
SHA-256: a14dce4974da7303109732d3e1699c38264cd2fa1bfe8a8214c828f9df81f7bd
font_01_sfnt_off00011419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11419 10956 bytes
SHA-256: b9f0bd8d64eda6d60278378a7ac99a949aebc6a4ccbf390626fdd1b554f67c4b
font_02_sfnt_off00012d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1