Malicious PDF — malware analysis report

Static analysis result for SHA-256 3002b63978b56918…

MALICIOUS

PDF

154.2 KB Created: 2021-06-27 10:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aed218d86cbddea248a1243fed6e718f SHA-1: 1564b71a74d938555ebca34f1da9c953f9774b00 SHA-256: 3002b63978b56918881f39b6e64fdc931c2da0b10307b137df3a32c54c0942d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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
  • 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://arendic.cl/files/remazuwazupiteg.pdf
    • https://angkorphotographyguide.com/userfiles/file/38060011040.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608360ac23bc3---loreritezifutoweme.pdf
    • http://unsersohn.ch/images/file/56724915109.pdf
    • http://medrea.ru/upload/files/47091284854.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a88a65306d667774d4f0dfe811650fc6/1734066903.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/sutofomalepu.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9a9467935---meroferijukakonapevave.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/66f9e800dfa2f6fca520f9ddcedf7a20/tojali.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/8452b687267ef4b21a6ce06e45fe17ec/73008300125.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/67f5455aa4b5a456cfd480f7c0b58a99/6545583731.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/4tqjebo4a4bmedhufs5g4vtmol/85238044362.pdf
    • http://beateromer.com/bilder/file/55341948320.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a4c670002---40447788451.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/fokevunikeginivoxawejine.pdf
    • http://japan-railpass.info/images/blog//file/kimaboruxozal.pdf
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/64cs7dq963jetjb6uoivji0o1t/zaropasat.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e990547f3a---tegozasataza.pdf
    • http://usaoxin.com/userfiles/2021-6/file/jepuxuwajefisuz.pdf
    • https://sfasg.jp/js/ckfinder/userfiles/files/kopatevudoja.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d1ec0f4e5---niwujasixaloridozutikad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+of+athena
    • 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_off0001eada.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EADA 16792 bytes
font_01_sfnt_off000202f1.bin
8a59a3e3ee909716c8ad003ff0af5ad5c74f869336363629ea512e1492980f69
pdf-font-stream PDF embedded font (sfnt) at offset 0x202F1 10172 bytes
font_02_sfnt_off000219a1.bin
96c24a1b1eeb999f22a30bd6a51660afca9b457bef62bdec2f424b280fb81202
pdf-font-stream PDF embedded font (sfnt) at offset 0x219A1 28836 bytes