Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d08c72a166fcd7…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 17:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e253919ee7461120f078ee3ef024ffc SHA-1: efa7af3998e174455e171dac949272c889b60b37 SHA-256: 93d08c72a166fcd714ca44cc095aa94b1f07c1aa4115e59052f71ce642aee46e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains an embedded JavaScript stream and a link farm pointing to multiple compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content or phishing lures, indicating a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081919e5e1dc---wedikedigujulikoxuwo.pdf In PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/wezunovufawegijibud.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/2f13206b8c9ba4a61081cf7e7860c9a3/kexugivugafutevifibax.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/35221202516.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/nipiparozobinebixanu.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/78818904985.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/44875259383.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/va2g9c7hnikoq5pe4p4vpaf765/tomabakejaja.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083561db42c4---talafavupatoz.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/55229752779.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e71089bb8c---tojipelu.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/sewuj.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/erltrmaqs93jq6l7fi2n96qpe6/deramowibaz.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/1114941426.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd5e81c0fb---37864360478.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/27014918847.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f5f9d952e---nuwixesumadopokalejuno.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/30877168825.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46fa92adbe---legetaxuk.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/48911231134.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/69889891878.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/59700900900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=kenmore+18+inch+portable+dishwasher+manualPDF 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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 17676 bytes
SHA-256: 169c72a4f406af768ea2da5b0eaf2154c99e98d2f6e6fab03a23ca4eb9b656a6
font_01_sfnt_off00010c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12447 11356 bytes
SHA-256: 2119393e73b6cbd3d3b276ba6310fef1668959354d0ac14b9052d6bb0598106f