Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ca5c7ebe2208e2…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 01:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a93dc10bfc225aa5388e11a1e9c5b352 SHA-1: c1ad2852f5b1906dc9459e58f2e01336fa59154d SHA-256: 06ca5c7ebe2208e2a94f5186bb6e79de182734d336fdc04000517786f066ec13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of a link farm on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://melhi68.com/clients/69549/File/ronir.pdf In PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51d77205e---17847268039.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118d1e8c44cd---bozizugazugebugevefabuj.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/98543f6ea069448ff25d727ce562ea54/62859879531.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff723c5cc0---28149841406.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/murogus.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/xejakoruvokiwokijufilibul.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/70114424043.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/52535450794.pdfIn PDF document text
    • https://greenvision.vn/hinhanh_fckeditor/file/tufok.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/telilaluvus.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/89705830319.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d38f4744d9b---51410101309.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/xodimu.pdfIn PDF document text
    • http://padgettlawreunion.com/clients/79772/File/gidegex.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607635c4025da---bevuzexe.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/91246908402.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796e40169f7---21605854945.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/mijexiwogexamibat.pdfIn PDF document text
    • http://meadclassof1991.com/clients/c/cc/cc689d7a74a098ef67b43942063c7ff9/File/damafafog.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/febuwelevufuxup.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lgg58el1ks9t777f30mguq8stq/divapivisipexulotafo.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab29c900b0---padunolodufixudagirakate.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/gifefoki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=pearson+education+alien+periodic+table+answersPDF 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_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 10836 bytes
SHA-256: f1c42cae5798bae6916b94e77712b027a12897c76c97dbeebb1b95617ad51d65
font_02_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 17312 bytes
SHA-256: 432213255f513d9361894085dc51b5d4be8f0bdcc6143067a6dc2ae3dd2c36bc