Malicious PDF — malware analysis report

Static analysis result for SHA-256 d489955cad5a3d97…

MALICIOUS

PDF

70.6 KB Created: 2021-09-08 06:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5a1a7c4e7a886d5a481be48e159768a8 SHA-1: 438591b08f7fd8b6261e6fdcdb17358a2b2dc435 SHA-256: d489955cad5a3d973c35698cfe4793c5fc83f12c23b0334820d87138639551c8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The numerous external URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggest a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=milli+q+academic+manual PDF link annotation
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/5293931249.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/kobojevekexaj.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b01ba944057---gizibopegoku.pdfPDF link annotation
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/menikixexofape.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/37763441403.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d6cd0d297---96367187637.pdfIn PDF document text
    • http://seedcambodia.org/htdocs/cljr/data/files/babisajowilatenisowixu.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/41836763596.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a99afaec2e57ef1ff73d4725d6eb6b6c/16403763025.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/oa87d46mcn5muin2ceb9b6bh74/jufavamoguxinaxotukisulu.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/9932730902.pdfIn PDF document text
    • https://activepymes.com/pub/file/41063080546.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/8130619521.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607936b6a1272---32724269879.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/lajavisisakuxilutetemek.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/968d43e6044216e11ba7fe8666fd151e/patojumig.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f17ba4833---80966458956.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/jewopexoviwobaxez.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608270d7356a2---libapefebifunevoluxuzevuk.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/q1c0ugdrta2m694pul7i6e9491/medogometetokukuvet.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/2974370243.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/nedanitodof.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_off0000b5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C4 10284 bytes
SHA-256: 200eac8e2d597a0a5f9a4548034a8b444be5d6caa1f0aecb5bb610c3e04c620f
font_01_sfnt_off0000cc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC95 15660 bytes
SHA-256: 33bfc9c63382ee60c04cf862766b781336399659b9f475497c90574eccc7ef3d
font_02_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1