Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcdc2586886b128…

MALICIOUS

PDF

86.5 KB Created: 2021-09-01 09:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 660b5ec307e55f3c2e0ec87b8cc21c6d SHA-1: 16beffe87dbe41d918186ea8c14412791978eb54 SHA-256: 0fcdc2586886b12855c2f9db7e38ff2c54cb978e574507ce385f940e33b8955d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/a3dd5b28ac6563ec29b999d7a6af46d9/26393661639.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7d070122---19822366288.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160d95d92ed485---valuloweduzodujaluketopi.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088207e2687d---82899089259.pdf
    • https://avonsteel.com/UserFiles/file/80467742113.pdf
    • https://cakenflowersonline.com/userfiles/file/33455893091.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d2129ece56eb06ec0ca28585eba146ae/64409705669.pdf
    • http://chono.mn/uploads/userfiles/files/46546944203.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fff5640c6e7ab49c638404bd5cc25fc6/12309375843.pdf
    • https://foodsafebox.com/ckfinder/userfiles/files/wozirowofon.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c2f7db0f7932f8b9b633de0f78ab7457/riposodurajo.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/3mh61gvocl6u2v0nvaslr19l8o/vepirokigolifosegodomof.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/907b9175fe0171791205c0baebd32acf/95526763571.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0f8babb92c4c3a858581127e1a712588/marajolegotefob.pdf
    • https://tch.lu/files/files/50296756393.pdf
    • https://bibonatura.com/ckfinder/userfiles/files/kotoxalivavosigowagipe.pdf
    • https://anmimar.com/royal/userfiles/file/xesivuj.pdf
    • https://ovistar-dz.com/ckfinder/userfiles/files/31316715854.pdf
    • http://gunjanjain.com/app/webroot/js/uploads/files/12687650187.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5b6595fe---xizewob.pdf
    • http://alliusie.com/userfiles/file/64402952716.pdf
    • https://mangallagn.com/images/file/3452523748.pdf
    • https://ekransamara.ru/files/nixaduradebiv.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/eb3e2bde514f1d11ffa5405da13ecfe9/dosirefirujovu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=six+of+pentacles+yes+no
    • 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_off0000ed3f.bin
7e95fecdd04cea6dd029f94fcb4b8d82b53baa4a2c63a6ed5471c0402ba70eb9
pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 17404 bytes
font_01_sfnt_off00011a07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 16792 bytes
font_02_sfnt_off0001321e.bin
552104e763f725a8e48f39f58b0bab9f004b25e97ee0a3c6ecfccb5cae6c4d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1321E 10664 bytes