Malicious PDF — malware analysis report

Static analysis result for SHA-256 47eda4c506b37e38…

MALICIOUS

PDF

83.6 KB Created: 2021-10-20 15:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 01d639b751b1b7adfbd6b7ab2304fa68 SHA-1: b62a1c9c2b89908dae4f33a8cab41e4bc12cd93c SHA-256: 47eda4c506b37e384ec31285d6a9d53edddcbe2046ed896bc978aadafeb7c840
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. It also features a link farm pointing to compromised WordPress upload storage and other disposable hosting, indicating an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://qkon.ca/images/file/temutadodazetemogotoxuma.pdf In PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/9201079860.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/rapipururip.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1616408493bbd6---49897900650.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/74711370591.pdfIn PDF document text
    • https://dootion.com/data/attachment/file/rokanopaga.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c79ae880e1db5c89b2a2dce949a5cc54/mugowugabezolal.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/xifutizopasaneveta.pdfIn PDF document text
    • https://alkoplast.rs/files/92178985324.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/orncd35scngt3hht9pb7phnpsu/23314552900.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/49713782402.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/rowufexivozatenenuwumijoz.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/zoworokazuk.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a21f0316e---36670144170.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/dubepikasolojedus.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/gufirurajologotubanisom.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210906010955.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/27448688191.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612febf890e92---54524370327.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/90142365112.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/nixafujuluxuvoz.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161568bad5c9e9---poxoxozodasirebexenosiz.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/tatufusinanosij.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/zasewikatew.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/76113500014.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/7xhmvLXWVJc/uplcv?utm_term=yoga+poses+for+three+people+easyPDF 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_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 10536 bytes
SHA-256: 9df87016539b4bc63d79bc24e7654546b709981106fd044b7042f1c0fccbfed2
font_01_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 18020 bytes
SHA-256: 38cfe644a4c2399e7db647804a2230fbd42c1184a95d4aa09cfa0257f427720d
font_02_sfnt_off000128f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1