Malicious PDF — malware analysis report

Static analysis result for SHA-256 149b0ed6c47513b7…

MALICIOUS

PDF

73.5 KB Created: 2021-09-25 02:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3e39e38b62598147ead725a9fa496369 SHA-1: 5a1aac1f0a905793c26cae7140575b3cf753b88e SHA-256: 149b0ed6c47513b7c4e7e7bcf726d3b2d218051b3c9bc87cbd8750817a2527ae
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://goodluckfishing.com/ckfinder/userfiles/files/67929957919.pdf In PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614095d045e18---nedesaduxovogeg.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/talawezotuzedebefutomeso.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/lefotawufanixuxeda.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/28352209330.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/84358879567.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/65747148146.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/9808059073.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/86136827893.pdfIn PDF document text
    • https://tarsiman.ee/files/file/muzipa.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/11353190799.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/jutugadiwaveneg.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614074b06b97e---80150917794.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/36492173733.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c605a6271b---77310408066.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/nowetizixeke.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/nowodikomividufesogoj.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/xulojutarebeveluzegaxe.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/giximitoligetiduku.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/11326464421.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/22079134635.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/xekenibekipakedomilu.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/63384620034.pdfIn PDF document text
    • http://cbstav.cz/file/lozedatudeto.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/14834381516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=forza+horizon+3+obb+file+downloadPDF 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_off0000b713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB713 18900 bytes
SHA-256: 0d8cb6fc28b328a36c677cf251968cbcdde42c372213e2a84b89f08b013e0185
font_01_sfnt_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 10620 bytes
SHA-256: 1f3733e143d4282f59e8ff8406dfaa416c3cddeaa5ddc487cb44312b88f7bca7
font_02_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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