Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c783fc061e787ee…

MALICIOUS

PDF

72.2 KB Created: 2021-05-06 11:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e6f7e062523d1dfc699b0473125a2111 SHA-1: b5e4381d78da49b266f5300f39f886166e66c09d SHA-256: 4c783fc061e787eee4eab35e5002ebca40b4fcd03e1426345afe0cdaad8c4438
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing lure or malware distribution vector. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting PDF files. These links are likely intended to redirect users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 5

  • 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
  • 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 http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f68b654370---60150723856.pdf In PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5n84aekmrp9o45rbf8rlmhbt64/41743834140.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/kdkieh5pl2827mqtvj83asijio/vijutilizage.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ef7867aff82eef89a6ef14420a731b17/baxejukizuna.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9f82137ae65ea63f8f412a31b674d532/ronugo.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eda8ef510---84801771805.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce2bc73c19---dotiwagegisatul.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9239dc10c---49697055460.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/8078b2347320163bf2cbc5c4772001c1/22957291949.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160817c561c626---83684495709.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/42000538796.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/44732efc2f82c44b63a103d4d18d18ae/68831223610.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070a062ae748---duxezaxivamimudad.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16075da9255749---nufapufinoz.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780937b8183---xivoverazesopijisolek.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a988f62a3c---pikelu.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608784172ac0d---39299378028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ios+13+public+beta+3+ipswPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 4992 bytes
SHA-256: 351a90526bb44c63f32fb54a8539796d1283ef7d2f699d63f60a888a0c9f88df
font_01_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 11144 bytes
SHA-256: 2b034dfc3f5cb0fcf2fd7bccad29afe629da92feec597122eaa6855f9b3b8b84

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