Malicious PDF — malware analysis report

Static analysis result for SHA-256 6328ee5e0964c9dc…

MALICIOUS

PDF

78.0 KB Created: 2021-09-09 22:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60f0714aed81709b7cf7def4a88f5b3b SHA-1: f6b4d01daa7678ddadfd2a43fe0832ddb7f904d7 SHA-256: 6328ee5e0964c9dcdd667508a3048223142e2c59c805669c7e6ebe70b65eca9a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to disposable hosting or compromised CMS uploads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, and the presence of 'utm_term=gta+san+andreas+download+for+mobile+free' suggests a lure for game downloads. The embedded JavaScript likely facilitates the redirection or download process, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4847

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://professional-tuner.at/uploaded/file/48397197013.pdf In PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/zojukidop.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/mukasofotokunepalamurene.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/wixufimagikevodinu.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/lesebitodekivevaf.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/wosaj.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/40743833028.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139298aee619---zadodebizubakaw.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/16755965763.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210907150359.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/37766004809.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/60705720947.pdfIn PDF document text
    • https://menu2uplus.com/images/file/12466194139.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/99342511874.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139419934efa---77343209993.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/6138eb730a942.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613735d4238ca---6194946475.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/jovupibufifisugagaze.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/12707911036.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/nepunopanujelugasepuvabox.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/28391330114.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/91739023318.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/2021911929556789.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613745cbd12fa---zojowutaselajizunip.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/50596077287.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/54022012136.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=gta+san+andreas+download+for+mobile+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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