Malicious PDF — malware analysis report

Static analysis result for SHA-256 502d0d946ad191ba…

MALICIOUS

PDF

94.3 KB Created: 2021-07-23 02:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6d3827b26f4662ad268f5ce40ba0b041 SHA-1: f82e8006d6d4d8a300af3015d09e1695b9078972 SHA-256: 502d0d946ad191ba656f3b0f3d218a4765f7e550170f04ab791d5149ac25cdb6
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The presence of embedded JavaScript and a link farm pointing to compromised CMS uploads suggests an attempt to distribute further malware or conduct phishing. The document likely uses a deceptive download lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://moraure.net/js/ckfinder/userfiles/files/mulewo.pdf In PDF document text
    • https://penal-garazh.ru/files/20044273394.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/835592779.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/2897fb05d26be5170d253781e491b182/55728987636.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/dudiwuvinudexefibumawowiz.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/90111d02236232d459d6e6dd7b558afa/tarolaxajagesajubuzolojez.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/zokalijokena.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210602_021309.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/4797e3992442fefc6cd77121ac892089/dozemijediwuvi.pdfIn PDF document text
    • https://flyags.com/editorResources/file///21438949706.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c689d787d7957d7e26a186587749730b/61839306179.pdfIn PDF document text
    • https://alyansdugunsalonu.com/userfiles/files/loduzojowatesalojevekopaf.pdfIn PDF document text
    • http://mesterek.net/tmp/2033596903.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16092d203bb409---31581211066.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941fe4df0bd---nixegevozufixavimax.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adad52deba9---lejakedafo.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/miburedivatapebodaful.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/musufovituwabuxavuna.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/jofulosuminu.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/17161905562.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e593319453a---69484721581.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825fb95bf35---46379095660.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=bleach+vs+naruto+android+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 10772 bytes
SHA-256: 5c40748c6ae4ed1b8ebb58664ff3d6a507b73e7b48289e5d2a2511475b0f5798
font_01_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 4076 bytes
SHA-256: e19a5bddfee396915a216def0ca5105ae575f3d1f868246fd855a39c8677880a
font_02_sfnt_off00011833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11833 28516 bytes
SHA-256: 4b53523a10f8f78300f673c9a4e0f9e44457bc1118156bee8b9954246cb316bc
font_03_sfnt_off00015275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15275 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1