Malicious PDF — malware analysis report

Static analysis result for SHA-256 60402e2cd0015786…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 04:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7f703ca7137f80176e81a87d146e7899 SHA-1: 70ecc8e24dce1e9455f6fa6f5198bb93c5799fe6 SHA-256: 60402e2cd001578602f8665b65ecfb4632fb70f362fec518c5d6f5a4992c6284
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/850d731a8b3717b7287444f4ea6d7f5f/90709364737.pdf In PDF document text
    • http://abwingssuffolk1.com/uploads/files/tedipedufotutotelamivipuf.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/k66uuhpbdmkuouj89jl7e70lg0/4285266317.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/nilizogaxorabisagove.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/21291732373.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/noxupobevumuj.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202151987213916.pdfIn PDF document text
    • http://adveotec.com/img/file/mekovurowisimusinakedi.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/tevelarizivibewokadebe.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/93665499317.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/sarulifivozufuxanepiraz.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca40c6e11---55023224063.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/memanekewemop.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/roxekaxiju.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/zozuw.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/jalulosasa.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/kogezojikitevatuwadi.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca379f2934---wikepukiwegagob.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/54015362556.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/73580657740.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/91793452961.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/2ujlub0ts81gkpvg0v7ik32vob/wokikenelasavepotafujab.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/67596930600.pdfIn PDF document text
    • https://geo-decouverte.kenamedia.ch/ck/ckfinder/userfiles/files/lejuxenopesulenemajumik.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b42b5014379---vurimozisolotiwabam.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/c3570f7550a528ff1f2fa94ad846f314/33441379083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=digitalisasi+pelayanan+publik+pdfPDF 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_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 15940 bytes
SHA-256: 66232847fd2e6a1e07663625a4e10f7e2e607f11d62d7837268cf482f8dc602b
font_01_sfnt_off00010b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 10900 bytes
SHA-256: e42f3fc5862ba6bd0d71d3096f5628014b3bee08dfeb6825ffc4d57fe35cf29f
font_02_sfnt_off0001247f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1