Malicious PDF — malware analysis report

Static analysis result for SHA-256 060b3f3715c72c7b…

MALICIOUS

PDF

89.7 KB Created: 2021-08-29 01:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19105c4deceea38e498abfaefeff2a80 SHA-1: 2bc8f65d89904cdf724fe3de03b191d3eebf28bb SHA-256: 060b3f3715c72c7b8b15c0ee92d799eccc20c604bd735cd25f19cb1122e66c6e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/ec7ea18668b45cde42fdd8a4ab1dedd3/15907335849.pdf
    • http://cnsgawefgl.netsociality.com/upload/files/kobilatafaxem.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078445e2b030---xojerapirokirapupud.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/903a85048f5343d7cb89e0860bd6b5e1/49500307789.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2106171840300228349jvz48.pdf
    • http://self119.net/upload/userfiles/2021/06/files/210609071821.pdf
    • http://hi-techfiber.com/userfiles/file/63015374720.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/df63fbc0094351fb76e08fdaa0b0bac0/litebobamigavawuvofisusij.pdf
    • https://tolgyesvolgy.hu/userfiles/file/bafaxapobixuxarupi.pdf
    • http://miraesusan.com/ckupload/files/tijodonasamuwituxewated.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede77e40db7---kasusitufugojugok.pdf
    • http://wagnerpc.com/userfiles/files/95604392386.pdf
    • https://cabsfromheathrow.com/userfiles/file/rimawekewatavopodalebadub.pdf
    • http://studiofantino.it/userfiles/files/24795761364.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c09546cba---xexezonefosaxobu.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807cd130e09---88123919922.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304ea3d491---radanegorokesinaranowejem.pdf
    • http://velocimapper.com//webfiles/file/67113245542.pdf
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/92900586016.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b97462425c2---geluparote.pdf
    • https://aradovan.com/userfiles/file/nikipigufikoxikuritomiru.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/801dbbba0f99f55a87c1b6bcb30bf181/nosurojumur.pdf
    • http://marinapogon.pl/upload/file/30670784426.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=demand+shifters+examples
    • 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_off0000f8ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 16792 bytes
font_01_sfnt_off000110e1.bin
c909a6f1d852af18a8ec953d80782040793d1615c4ff32b14a4c4511d2bd7400
pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 10744 bytes
font_02_sfnt_off00012954.bin
a98a063eb7003fd3ddad3d6897011bdc77bd096016168d418d0960d2b5eadaa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12954 18108 bytes