Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c30c12201b46568…

MALICIOUS

PDF

84.6 KB Created: 2021-06-27 04:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9b78870926a98e7c9bdb4d4df068d3e SHA-1: 05b4bbdc5a2e6d47741b27ca1f91a0688560322d SHA-256: 1c30c12201b46568dcb48ea2b397ddfe50da73d62090e6842401917e15cb3a01
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://oniceh.ru/uplcv?utm_term=acoustic+fingerstyle+songs
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11c66ee9bb---45483059431.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef7fcdbba0---ximupewubevaxew.pdf
    • http://assushop.com/userfiles/assushop.com/file/legokuwememejujelisafug.pdf
    • https://echipamente-scule.ro/userfiles/file/denusogamodiso.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/9932a06ed8b8c9a34bbd2a4ba2019e32/jomubirovogovi.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16083585757e4c---8617810329.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a090e79c7c4---rulikomazepesijobubog.pdf
    • http://glotecgh.com/upload/editor/file/4310710318.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/04f0073c67003287dd24fe6ea93276ad/52137873594.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8651bab92282ee94f09fb4ced33c4289/gamovurogowaguluwam.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607557c8b3e38---gugusidivuzutevulipik.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a8ef453be6666ad7abbffe3fb1d2ae9f/46692915843.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e0df03103b33ef29adc2348dda63a09/jajuvesozujom.pdf
    • http://webinside.pl/userfiles/file/zuxupug.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878f46880f4---lixetukibo.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/bb14abc299ca51d738258e320628481b/75575473407.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd45977d7e5---70887880565.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/59498f51d4c5f070b956b0a2d76bc06e/28617042411.pdf
    • http://aitrans.cn/UploadFile/file/F1202106141555258722.pdf
    • http://bigxra.com/uploadfile/file/2021051302210673499.pdf
    • http://bbdecontra.com/userfiles/files/pakiwugegumivupuwe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 16792 bytes
font_01_sfnt_off00010026.bin
450cdfd653b1a3a8c29481ae127427687cad210b25c8fe68229aa94a67f864b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 10544 bytes
font_02_sfnt_off0001185e.bin
e171518f4cb5eaeda7abdf19d7408834538a963e889772d6605c098b0ce2e989
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 17284 bytes