Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd9a29d98d06ff7…

MALICIOUS

PDF

82.2 KB Created: 2021-08-03 21:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4e3cf19a263c3fa1ec3aa510092474fb SHA-1: c56ce44485f441a4f2dad4d76a1825e5e54f4dcc SHA-256: 7dd9a29d98d06ff79a2248e6d5130594ba6ab3f4dfc93819dc38a0282b20b293
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious sites. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution lure.

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://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/oaolt3iesb9fjq5htger5ph7hv/65397731187.pdf In PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/43765107330.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3a3f48497---78209263974.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/o6ldmrt79b1jmd1fctt6g7b0iv/fexetufon.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/89aae64be10cc08c8db837f395af3e39/mexajejutuzavajabesebaxo.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/616998c230377a3f535d106f9437e574/beputasokuduwibof.pdfIn PDF document text
    • http://gistys.com/userfiles/file/83520775260.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/nobotajiju.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16095990093e23---fudorejixe.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/5020407135.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607597794ee7b---pilujo.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/78291721672.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/falegiziludujimev.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/96234329023.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/zetumiwusokibamu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47e4d21901---49954133000.pdfIn PDF document text
    • http://toonesk.com/upload/xofevamoxunosomemikujotof.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/47196301030.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/dononux.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/pakadiwaliritufo.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/depigedimowabefo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b639faed1b1---bogodegawuresiwodowex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=virus+and+bacteria+venn+diagram+worksheet+answersPDF link annotation
    • 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_off0000deae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 11224 bytes
SHA-256: f1ecb65c168d800e56457a77910b502e156d8d5a8943f56a0e3b74f356dca550
font_02_sfnt_off000110c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C1 16440 bytes
SHA-256: e9593712f9040c2f2d7da98fd2acf95ba82308e7301175366d1838fe0023ae2f

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