Malicious PDF — malware analysis report

Static analysis result for SHA-256 042da8b3b2c2ca00…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 07:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 05b2d97a261f196fdeaa4e4eb7068986 SHA-1: 6551bd10b96c837cc8eb5bef908ff88194fb932c SHA-256: 042da8b3b2c2ca00e4c693a88eca1b18ac5d0d470fef771685ce9e6afbce6cda
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple domains, including one identified as a compromised WordPress upload, and another using a disposable hosting service. These elements suggest the PDF is designed to lure users to external sites, likely for phishing or to download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://mlmrockstars.com/ckfinder/userfiles/files/sisodatuj.pdf In PDF document text
    • http://laboratoriologos.it/userfiles/files/94660513740.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/19724525848.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/badelutimisawojonogag.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/18929103341.pdfIn PDF document text
    • http://toonesk.com/upload/40266520473.pdfIn PDF document text
    • https://agrando.cz/files/file/95002050506.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/70994400893.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/12055295617.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/nalagapip.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f510b433d6---22961364164.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/mixedenozukufivagekavu.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/61370986986.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210904195412.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/79118286559.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/mugizawupuzafavo.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/47511505449.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/87f50ed4c96652af082e00abb91fb5d7/67780501951.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/rezafanipovikavifobara.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/10898918446.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135707a0cfa8---tumikozuxogupu.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/kulagixiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=juegos+android+apk+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_off0000d205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 18188 bytes
SHA-256: c9dabf874dc32ab27fe1145e21ec36987c4d2a151b275fd059fe0f05d602811e
font_02_sfnt_off00011913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11913 10736 bytes
SHA-256: c8c6f1d177ab9810d964a1bae16263ec3b1ddb05e31660f6865b3341674cbe7a

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