Malicious PDF — malware analysis report

Static analysis result for SHA-256 3054eaaccea4e910…

MALICIOUS

PDF

79.7 KB Created: 2021-06-28 15:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e6c4040caa99495f41c703deebfa4e0 SHA-1: cdf0935f14cab9049f4bbfd72c7d04d07262188d SHA-256: 3054eaaccea4e910e8dbc742858095a5290f5a3413ad3d4d0d0ce4e3c1a62114
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714624c871c---wonizegaf.pdf
    • http://hainescentreasia.com/images/file/62098028662.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b748e891---bamivami.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/bdb3m1a0or0uh75ltmvoa1as25/47054904507.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077e30258d2c---14172740947.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bda66c4c86c---50819720152.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/548e0fee0e0a4a0226eebc15aaa46f55/5248993045.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c86e6307f6c---25233412806.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/remug.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160801ddd08f0d---20847685082.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f127491895d111d7badafe5d70d48510/kimurefavubika.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083292cd492c---gaguzodinutifigiluvidaga.pdf
    • http://silesiacapital.eu/data/file/vujavidamo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f50d9d3fb0---dalesil.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608541d8c9c47---71807865985.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/tosivepew.pdf
    • http://divorce-difficile.fr/userfiles/file/21350123241.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9c0ad7bc406c0455e1f683575598a531/kimizovudesov.pdf
    • http://circuitoinsulargc.com/documentos/file/dekujukojosilurade.pdf
    • http://sgyscom.com/upload_fck/file/2021-6-12/20210612191546434620.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/pofipa.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/770004c3248f84366bb28a99a6efb766/85437680038.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42707cc321---jasavevogumo.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/8d1d393ec049a4c8a2616b9ee6b617d5/repubuwuzob.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091021f433ae---72934618860.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=three+brothers+harry+potter
    • 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_off0000d64a.bin
9d5d07106f569789c70b25cc3b8066667d822ff38ab983b2e2d92424079b7926		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64A 16952 bytes
font_01_sfnt_off00010256.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10256 16792 bytes
font_02_sfnt_off00011a6d.bin
8ea486809cba35ff5499a83f7dc33cb5695a1ee1ae8775a4197bdb2949c1365a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6D 10324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.