Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4d982e7f97955c…

MALICIOUS

PDF

84.4 KB Created: 2021-07-10 06:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c650ccb2a365fdfc72d70bbc20b3db33 SHA-1: 4c7e522589099a3bf771ee9affb2d8d59331c66c SHA-256: ce4d982e7f97955c0a353e58b15ee8046d93ec2da6df8d63c4f5b51ce141adf2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The file contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality by facilitating redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://coretry.ru/uplcv?utm_term=legumes+vegetables+examples PDF link annotation
    • http://mabifitness.it/userfiles/files/bivikuzaka.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ldcg140hbnrde023mq4d62fbvk/gamupo.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e50ce2d432---juviter.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/57878006688.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad301f73847---winipomevatolo.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60d0125b0f491.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0bfb0e672---pasakaxoredibato.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/v42jkibl2cnfm8m8r2rnbju55s/67045993422.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160943cf6112c9---dudawejopiro.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/c4af8a04b0e3329fd5eead0b484cf747/luvukobiwizu.pdfIn PDF document text
    • https://nevisnews.com/userfiles/fisadawoj.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609196f0b8a73---95953028112.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160906ab82814d---rozivoxapumodibose.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc09b05cf61---zezinugazamigazotu.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b65ba71c46e---tetanulefajo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14e1531665---42846246517.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/jaselomi.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d46e0a33b---jepofon.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da15e820c50---65222530773.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/rulokovanojesilogi.pdfIn PDF document text
    • http://mousike.it/img_ins/files/defiwenudugosoj.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9d8cd660257322afbf20a0c41ea1d68f/mijuzosapeloxevetezo.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_off0000e874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 17168 bytes
SHA-256: 2e3a0bd535433d594c60d6df4592d67d1e88f2a6545f21951f8c74e1436535f6
font_01_sfnt_off0001145e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 10544 bytes
SHA-256: 9f07b00b563c27fe759c2a4c7682685c42611fa71a928d6175575e79f9ca5b6a
font_02_sfnt_off00012c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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