Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd391eeb9861fe1…

MALICIOUS

PDF

84.7 KB Created: 2021-08-04 01:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 486067574d9bd65a9b8a3a1819973d5d SHA-1: 8bed4f314505e012ce20a9af8d340167d50ed6bf SHA-256: 2cd391eeb9861fe1e95e5ba8f6703226e9877d7070302bbc58cacd9e6725c39e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting. These links are likely designed to host phishing pages or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/fc9f0536316b18306b7595b34cd957cc/nijiwokolifopolabu.pdf In PDF document text
    • http://seksdagen.nl/userfiles/file/kijagoforedepadodukuvo.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210528154259.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e6e0e6386---newibiwatipubasikegitudew.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/jusijekux.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89477082656.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca0635975---mufazete.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/84847485686.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/xodiz.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/68496479699.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609f362aad330---litazadibuvipisom.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/43839407243.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/39098257668.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b171dec48cc.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2e9d81879---mezawuwaruvolusedukagi.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/pimovebalevoka.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/32717728474.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d03af03f21---jipinit.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/75636305011.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/batimesesalinuxegu.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/57531133998.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/s30a13e6bsvqkpqu6kp8quiom2/16915133078.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34b1dbec11---vesulot.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/gitagasusizamugomatoxebom.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/88cdf4a06c68231e644c03b03647fa62/21628316796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ejercicios+de+escalas+resueltos+3+esoPDF 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_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 17972 bytes
SHA-256: ceee3a2be53fa54d46ba892b20f73a45cc40d1a4b7f08ab1b24ad9956aa53e35
font_01_sfnt_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 10644 bytes
SHA-256: 0e125932fbdc0f8fc9bf1c14cbfef6ea62fbad84ae054c05ffc15fb708ace609