Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdea22bb4628b1e…

MALICIOUS

PDF

106.6 KB Created: 2021-08-10 17:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c59dbe2d15d9cb9ad616204c3931dff4 SHA-1: 3b38659ae905d405814879e0f1059a002b721d1b SHA-256: ccdea22bb4628b1eb15a27ed28ba0ebcfc6de7ceac1a6f854c8ae0964e43b039
164 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.anieliasfx.com/uploads/textareas/file/zodijotivagor.pdf In PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/jovekaxugit.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc821a6e441---90814558867.pdfIn PDF document text
    • http://prota.ru/upload/files/3792428231.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/lugibamezo.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfc446a390---gosibisosewavoj.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ed99e65bf19---14104990050.pdfIn PDF document text
    • http://bensonhigh67.com/clients/55910/File/37690229280.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/78388274323.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4943201f14---94517304237.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6c289203c---92060905782.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/4ffk2e1qifr0at8221u28pj4j0/weloseleditozela.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/57987347878.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd4aaa82b4---jibiwe.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/talukebusukilun.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b0632144e---pasizudatozito.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/8bfcadc807c319654ce0cc0482fc0106/67405490454.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/zaxakekuvonifonenisu.pdfIn PDF document text
    • http://apcmagon.com/userfiles/vunupipi.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/diwatilobigenasoves.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/fobanagukudexijorube.pdfIn PDF document text
    • http://winso.tw/userfiles/file/vajigamuzirisuxamakife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cease+and+desist+letter+form+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12583 10544 bytes
SHA-256: 75b79147904d4e4d8b2830ae7d09f4a3ce0ce6df9a3cba6be37a79c20a997206
font_01_sfnt_off00013d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D81 18556 bytes
SHA-256: 32321811909d53d447491f47a2a0d7f5a40a55fedd8c0fa2044bd061a3fa150d
font_02_sfnt_off00016e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8A 16088 bytes
SHA-256: 21ff46de98f0902b53a5c0c946916a1dd4551bbaa4204463728281c4bc54dda8
font_03_sfnt_off000183c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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