Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9e3bc0323cf26a…

MALICIOUS

PDF

83.7 KB Created: 2021-09-21 05:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8e4a8a3089049f97eb8d6ecd187addb4 SHA-1: 2d720cf0328ad8f40882a7e5ed6bcbc3bf55d3d5 SHA-256: 8c9e3bc0323cf26ad656485371497ec84b07f2a8cd6c51e56f827970e9913bba
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://chcial.ru/uplcv?utm_term=watch+when+calls+the+heart+season+8+online+free PDF link annotation
    • https://landtop.com/filespath/files/20210909151045.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/lulasotizekevutap.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/sekixubojuduw.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/41081033015.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/tomopawukasexes.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/petemipu.pdfIn PDF document text
    • http://asustainable.com/global/file/genig.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/87173831471.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210906_C55F9AF9E57EDB00.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/74670325559.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/zokumejovu.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/tuwilotapasitukujowodisif.pdfIn PDF document text
    • http://teifsepahan.com/files/file/zumepafolakokarolezo.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/turawenemubib.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/nezizutogebi.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/nusafetubaramepene.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/vusarejulosapoza.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/fomifagubowifekivuxugisiz.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/fadupibezakexevurapana.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/tewaxobilimiturik.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/radaxufexiligeg.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/59802782298.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613596c8c37fe---44001469122.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/visuvubudegi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 10720 bytes
SHA-256: fd4bb47489dc9884861a742811ca550674cde05101f8455dae7ed108c84bcb3d
font_01_sfnt_off0000f911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF911 18548 bytes
SHA-256: 52f8dfc49377d3919f44fbbd841bd4d6eb07a14a1352d4504fa746e1b14d75e0
font_02_sfnt_off000128da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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