Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ab5bd62f7d08b7…

MALICIOUS

PDF

81.9 KB Created: 2021-08-17 06:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 95f4fe335745ace57d0752e0c3dcbaae SHA-1: 5a9f123331e8b98d24b77d29eb959aac2b851bb6 SHA-256: 47ab5bd62f7d08b77fb2da13fc9404b8644f5dd96db03cdc389bfc9adebca222
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/uplcv?utm_term=mototrbo+depot+tool+15 PDF link annotation
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/e84c724e577df841a2f5f5af6aff809f/62325873176.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a184ebcba6d---38312017019.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/bojopagizonasawol.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca2ab7a3da---sutulevijivupejegi.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/dexujox.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd3620a7d9---43489526012.pdfIn PDF document text
    • https://computerzone.pk/file/bevizitowafisotexaxuvuge.pdfIn PDF document text
    • http://greenld.com/userfiles/39698798860.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/rezugofakobujazekegi.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/a5191bb96b4576571f26c578718dba71/karulog.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/razumejudabidugoxujam.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/5renh8j234cf622s6e60mrub1p/vozuxewoxumu.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/9f878e0b07d0ebc3412a4a6da0b91796/63367803712.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/97947171094.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/21g5ladi96qb7964qqjpac8v87/85043092229.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/vizokilikonejilodalasibu.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/87892367578.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/jiloduxoba.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/r4rj0volco93fjd5s0639daul1/pejajekesukaga.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/80555735212.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/ab369b0c5248ff35535c243123260966/nafavetanuvawalasired.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff358cc3daa---menivoj.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_off0000e049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE049 16708 bytes
SHA-256: 67b0c7545a771047b3ca64c33c9bcea4f9dcfbc4e12279ea31cddf328c31c2da
font_01_sfnt_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12345 10176 bytes
SHA-256: b3b8abb7ea8f85d8ac0e32c901ca2d1887bff8520d0654e21c55136abb02b1fe

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