Malicious PDF — malware analysis report

Static analysis result for SHA-256 160360c339ff49e6…

MALICIOUS

PDF

83.4 KB Created: 2021-07-19 22:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6ee42dd2df74c236d4fdc7baa2132102 SHA-1: 1fd28eb1dfd697b3acaa999db301d50a40667020 SHA-256: 160360c339ff49e632251c8e841e743818567ea5f5dcc1d8a933dfed13f3c74c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload. The embedded JavaScript likely facilitates the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://odesignlab.ru/admin/ckfinder/userfiles/files/24095916797.pdf In PDF document text
    • https://ljlconst.com/admin/images/file/xupajutuzelika.pdfIn PDF document text
    • http://temple.mo/userfiles/file/gizamazokijixupasokonukuw.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/23837319636.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/sumotikazixatemataviluki.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dda5e8e74---fupatowukenevoxawexak.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbf4ed19c6---xexadig.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe34879f66---92097670077.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/138e24709e1150ec0aae74ba8aa02a36/mekamoxo.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/pulazimivajewujizafop.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/xolejonuj.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/an01a0psatmoe5ndr2ddtllol6/gunurinopijag.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/78c7163d9a28eb1dd548412f7d07c1a5/70426804801.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/mototinuwa.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/juzegeladezanidetis.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/hk96cj32kbeh1d6l43nqi7srvn/23016657324.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/35caob1img69qmacjqhrl2bi51/xanuxobazawinevi.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9420e9e7e---4070595794.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/walobijarejov.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acccfed5ac4---nukewupoxagage.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a7fc52cd8a6f113007e8525b9b837b60/18985394843.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c514ea61ce9---94572588713.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/pisozibepelikerome.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/tikubetorone.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954840b5bef---winiwonaweloxu.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/7302966736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=solange+a+seat+at+the+table+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 17420 bytes
SHA-256: cecb9c4596a53a8c0673dfe15630ea39c931841a828a24d0271d2216d5b202f3
font_02_sfnt_off00012686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12686 10636 bytes
SHA-256: a2d0648f8e998f4968426a8261afb16876547a23802fedbe6896452f5b969b90