Malicious PDF — malware analysis report

Static analysis result for SHA-256 746bf0cf3742de78…

MALICIOUS

PDF

81.2 KB Created: 2021-09-28 04:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f0403906adb3bedf0c97d9a5285f6b6d SHA-1: 118b567b17925b17dc6a8afeaab16f4e6a9a8045 SHA-256: 746bf0cf3742de786d3a89009aa1224187b7c7085673cb5f2ac63fc26a56d8d5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 http://tiszaikaland.hu/upload/file/76784729146.pdf In PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161329a846a7e0---pezajalusemes.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-5/20210905002512780264.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/3635550254.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/70825936605.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/92581695242.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/zosozarivezebiv.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/kevebeveleda.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/70635653072.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/gotepepisugefejivubano.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/takimorosopozux.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/80307325622.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/86203022429.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613611a32a93b---vidalimadovomu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/f668bdcdd0dd9a451104f3e8902c2574/24961748307.pdfIn PDF document text
    • http://melabo.com/upload/files/33914427440.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/fajisigodox.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/sevidog.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sisojipilunapis.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/xovix.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cf18f2175---26764097843.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/duxagagunekewowek.pdfIn PDF document text
    • http://brlairport.com/images/file/gilonaxifekagevijepekise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=tidal+premium+crackPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DC 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34
font_02_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 10340 bytes
SHA-256: d2545e758e8c13e9405d8656b770f48bbb4b415c204522ecd88eded04bb3d8b2
font_03_sfnt_off0000ffd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 20900 bytes
SHA-256: 51c9f8c13256f0d98705b2166dc2663b5202a6d34718bf22a9e1fdbf338d080f

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