Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e756162aa05061…

MALICIOUS

PDF

69.2 KB Created: 2021-09-25 16:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a949189446b34b276a928975ee2ec1ec SHA-1: d992d44e41c73304e5adb1a88f41ee3c1c655182 SHA-256: a0e756162aa05061f1de3d3197ccd7a43cbefc39c3f0e2f64699164796130d13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://seas2010.cienciaevida.pt/site/upload/file/sewatifamofoke.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f7d3e6bda59d25216cdcfca7d951fa26/tezipives.pdf
    • http://picart-personal.pl/fckupload/upload/file/33511163278.pdf
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/71757263575.pdf
    • https://maciejabramowicz.pl/upload/files/file/nagaxiduxanuwogamazesodiw.pdf
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/75669005231.pdf
    • https://mimpisiluman.com/contents/files/fazafarudodibefopigov.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc83463ae4---lexifa.pdf
    • https://garnizone.com/userfiles/file/zamatakikejelirojak.pdf
    • https://cfacgroup.com/uploads/FCK_files/file/5624423513.pdf
    • http://gardensyellowcab.com/admin/images/file/10430902974.pdf
    • https://kangaroovietuc.vn/webroot/img/files/20899957836.pdf
    • http://th-hl.com///upload/files/84190187113.pdf
    • http://xmzhj.com/UserFiles/file/ruxek.pdf
    • https://nicklason.se/ckfinder/userfiles/files/12474491161.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614c93e0b8cb7---44078607118.pdf
    • http://ahjygjg.com/upload_fck/file/2021-9-8/20210908114914620442.pdf
    • http://yaqeen-eg.com/userfiles/file/saxoduruwobagivogidakanu.pdf
    • https://matao.ro/app/webroot/files/userfiles/files/74450272365.pdf
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/tuzep.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nebukiwigerugevanuwipewak.pdf
    • http://siblom.ru/files/upload/file/valibefewadedifesu.pdf
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/wakaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=xnspy+apk+download+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1F 16792 bytes
font_01_sfnt_off0000c636.bin
53ad3910cee35c48eea3ed505280f00a401dde1d0c6edd92e1f58714c6743ae1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC636 10560 bytes
font_02_sfnt_off0000de60.bin
ed16d539fd3016d6a8ef1f0cdbaa4a3d7cfe940f9e980ebcc68feccce5684ec3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 15700 bytes