Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddedf1447c69388…

MALICIOUS

PDF

87.8 KB Created: 2021-09-02 09:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fb9e485efbafb7b648b0cd98516d227b SHA-1: e0470e678c828ca238b654ac483d18b649ce60ab SHA-256: bddedf1447c6938860f80990034b311744725792917951c242e5b70383f9529c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or are part of a link farm strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.moyekolodin.com/files/nodupoperakapi.pdf In PDF document text
    • http://valeneighbors.com/userimages/70418411660.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/moxufa.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/88132888883.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6342391f22---28991113721.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/84315932507.pdfIn PDF document text
    • https://noddy.nu/images/file/47437030818.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/gukazibow.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/vesepaxilev.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/666f609f8b76d6f4640b803e01992169/nuvosanobifekawaliji.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/39968054308.pdfIn PDF document text
    • http://absigorta.com/E/file/58963761719.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19382140209.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f2e0c66b3d---butisiwuzifariwipe.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/fh7ob06rnsads94djvej7g2lqo/kirosijakatexunemu.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/72118016443.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/294900d04549184d72260cc8a263d922/rodudopitubevad.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/26353671943.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/61105293501.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01945c33b3---81695667610.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/lubumed.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160be91759086d---85844642185.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/78852280541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+are+the+advantages+of+studying+abroad+essayPDF 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_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 19300 bytes
SHA-256: 2c0a592e52ce79a7c3f500693fd1283224590bf28c4423f85e40f1f46c39907b
font_02_sfnt_off000135ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EE 11000 bytes
SHA-256: 64edd2d1f0a80e734a83b1d2b3dfaa436ed194ec23d5125b23ee5ed389eb1a6f