Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcdd492996c997d…

MALICIOUS

PDF

159.6 KB Created: 2021-08-17 12:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 240e68327217895d0b9f7634936ed35a SHA-1: 5eb0d2c1cec4490d33adc0b6ea1954ffa4209634 SHA-256: 7bcdd492996c997d011477e55c996c42779cb156ccc412f86b039decaee43dbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and links to compromised CMS upload storage, indicating a link farm designed to redirect users. The presence of embedded URLs suggests an attempt to direct users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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 https://pistant.ru/uplcv?utm_term=cuales+pokemons+legendarios+aparecen+en+pokemon+esmeralda PDF link annotation
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sizapobewadubakanefo.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/cm5regdoasljjpqbtmsrtcianv/jigokal.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/pusad.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5be6054cf5---43568285651.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/13580772740.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/9b41554d84a48543538eab85d9c757c1/petudelezajasadewepuvefex.pdfIn PDF document text
    • http://strandedtattoo.net/file/60241925585.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620309299.pdfIn PDF document text
    • http://rideco.hu/upload/file/70786408440.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161061343a058e---36658003599.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a367e38d5b---71678848219.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/qia0vrk1u14196n5p13djtvs4e/28302431357.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/wugepupevelarokomowadas.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ek4vih92ufog814vsgckpnfiv2/katiwulumi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/5auc8lt5e5ga8vnqa367i3v1n0/74893652522.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/soxumabazisulilalodujepo.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/99505207447.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/npbja00pok09p0trb9a19jmbf9/fubaloromoboji.pdfIn PDF document text
    • http://prota.ru/upload/files/62378936305.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bb347a8e6---bovibadixajugumifafiw.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210801_18DEA6723403F0F4.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/18h4nqkrfvdifkvcmjm4l8q2c7/vaxuba.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/c889422a445a9163bd6d6b74a29b869b/timexojukugatuwegadaxen.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/33413754229.pdfIn PDF document text
    • 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_off0001e989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E989 19868 bytes
SHA-256: 7db2cf556cc45bae54027e59d8a1f9fa5cf4e1790401602c991726125aadf4df
font_01_sfnt_off00021c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C1D 10984 bytes
SHA-256: dcb3076014eb999786e1c63cbe6681e4aa6ea84657fdcf7363b3683689826b02
font_02_sfnt_off0002355f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2355F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00024d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24D6D 10436 bytes
SHA-256: faa2e9ec769c91c8d61f5db0dbd432a9fb338074c052c9079033e5636aa0d67c

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