Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bd298e5d3a79c0…

MALICIOUS

PDF

81.9 KB Created: 2021-09-16 11:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5bfd858f07600e1b16ad0566c2e949b1 SHA-1: d1276d22c998bb83c58069ebd25bfdda10f0a29b SHA-256: 00bd298e5d3a79c0e34fe6590785b981fd26192577ac2f90999059a9f297153e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://huntic.ru/uplcv?utm_term=redmi+k20+pro+is+good+for+gaming PDF link annotation
    • http://96rangjai.com/userfiles/file/4769009041.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/xonazabofatofuf.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/60782596922.pdfIn PDF document text
    • http://bndweb.nl/upload/files/47547249469.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/womufev.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/3999432787.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b98f46ef3---jiwojotapawuturuga.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613614b70c8ba---50928554356.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/40522620413.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/10771986524.pdfIn PDF document text
    • https://andana.us/files/files/96403435476.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/gotutimimi.pdfIn PDF document text
    • http://thegioioto.store/upload/files/jepujaluvitepajejofu.pdfIn PDF document text
    • http://greenglobepms.com/uploads/buximakamibux.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/3311c5f2de62e6ee68078fbc42310bec/37821837017.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/69060748649.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/85229945754.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/dejelinov.pdfIn PDF document text
    • https://frisch.ro/files/file/67452625199.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/10332049514.pdfIn PDF document text
    • http://devveb.net/userfiles/file/918773687.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a88b66d20c---32199115587.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/3886295928.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_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 18420 bytes
SHA-256: 329e802e9663b20d25f2d0c340fe29897b3807c7b8f8e1bd9c260284cdeac705
font_01_sfnt_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDE 11076 bytes
SHA-256: e29d326205fb51b53c4486649f2fbe863dbeba52c1514fe7789e29fee14c5038

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