Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05acb3ec64d9f43…

MALICIOUS

PDF

78.0 KB Created: 2021-09-01 17:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 256e2357fbcc6f1a271505ee6b5a2efe SHA-1: 67a1ac07b33f301c10bf904bf06651ed9bd560e3 SHA-256: f05acb3ec64d9f43b9488f0c780f43f09d7ba2c4299171ea700256dd6150ca22
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting it's designed to redirect users to potentially harmful content. The presence of numerous unknown URLs further supports this assessment, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/s7rq0l6hg52b7d6njvh795mm30/55859760714.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87c833f1e5---kojidejom.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/23e87619f65f66329625d7ca329c2093/satisawifowasovasomigaro.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/kefevukowefumitidilab.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/tomerigenori.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/50278198722.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1e7dae1f---77351075340.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/nosotubokuvukikawufenel.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073952e51b82---69412021256.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/vfk0tgvft6ud3cn1nhelbel023/vupipe.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ba3892f7---logovafe.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/9ec3628c9eed688c6056d64072e4b954/98632377117.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/mumaguvuv.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/82954104267.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/sesegun.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/sogegobazoda.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/51549870473.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4d291cef---detop.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/54870385355.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/40ed8b49e0403c0f97e1c082224ed853/ruvefad.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160954454d2a41---xuvama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+upload+file+on+canvasPDF 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_off0000d04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 16212 bytes
SHA-256: d19e538ea2d5a82c41fdc1888c97dbfb7227a6886d748ed582bdc0e38e8d08f0
font_02_sfnt_off00011238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11238 10756 bytes
SHA-256: f31c974cf36f0f6ac74037c598e923c173a3a261132c61ed337341ff96d5736f

Open this report in the interactive analyzer, or submit your own file for analysis.