Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2ed23b19c06c1b…

MALICIOUS

PDF

93.2 KB Created: 2021-07-02 06:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ec21558adda0ca7305950188842d120 SHA-1: e1fbdace77ae4098a1ca793f48db69bdf09495ed SHA-256: bd2ed23b19c06c1b0ebf374da46050906e60c84a506b752f7b7abaa5b96daabf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple links on compromised sites increases the likelihood of users being directed to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/cc09d7a4bc526b5f3dd05e7a863d57ad/72908569290.pdf
    • https://inverpalmas.com/aym_image/files/vebulotaxisoxu.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/ddtola1kj5bqqjdtfi9r1ou93d/9876281792.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081099d8bc03---sedotakoxamoreriv.pdf
    • https://artasedanasingaraja.com/uploadfck/file/tatorar.pdf
    • http://orderleesushi.com/uploads/files/noveteneg.pdf
    • http://greenplanetnepal.com/userfiles/file/72595346797.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/183chv3i4ujpb5c07cv796uv81/13066579487.pdf
    • https://fizjolech.pl/userfiles/file/sexowuraferuxa.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89347859736.pdf
    • https://hyosungulf.com/uploads/file/mokigopezapubesunokuro.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/4d4b1b496f0291cbaa8a980e5a94984d/89129880934.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072592670f84---36566681656.pdf
    • http://savaksangida.com/resimler/files/rekinuf.pdf
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/63688489920.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc3a14bd06---4913620088.pdf
    • http://www.lebedosapartotel.com/data/yukle/files/sopajofetisuxeged.pdf
    • https://biovuspharma.net/userfiles/files/wajumukimow.pdf
    • https://kawanmto.com/contents//files/tutexesori.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfdb6e4cc1---zumevelevi.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd474a15fa---83772538737.pdf
    • http://pro-elec.ru/ckfinder/userfiles/files/54460586173.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+lose+10cm+off+your+hips
    • 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_off00010990.bin
80b86c1fcbc2dc258a90f4a277539aeef748344c0cf4e9531e14f03cca2884b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 17120 bytes
font_01_sfnt_off0001362a.bin
c217de4ac855394f00e7922638ffcb9e4fff1c2127b6c225d58fc8dd196abae7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1362A 10944 bytes
font_02_sfnt_off00014fa1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA1 16792 bytes