Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bec7ca6bbb859ca…

MALICIOUS

PDF

80.4 KB Created: 2021-09-19 21:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8dde89a16786410a2611a7653bbccc9e SHA-1: f893e462502a158f574b276b0ee3358567d50923 SHA-256: 9bec7ca6bbb859ca08eb8caaf5663434918d0c18453151006b7c379e5ce0ae0b
134 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 within documents. The presence of numerous external URIs, many pointing to disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6443

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 http://garagehayashi.com/js/upload/files/75539110770.pdf In PDF document text
    • https://aqua2go.pl/galeria/file/4079147375.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/79486136489.pdfIn PDF document text
    • http://eternaseguros.net/files/files/kipabufevafotabe.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/68643089699.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/68525389354.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/zafuxim.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/88275694912.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/65259939238.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/39857937831.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/jubizawewerilut.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/latonel.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/nodefagujalaseboja.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/jiwizalumananawatud.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/doxutikatoginu.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16315700801950630267.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/89237343138.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/xizujolukulikomi.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/73649551181.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/57947487169.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/pupubizemukegoxezov.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/vilisabetuju.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/lodegijadelasavaradeg.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/99084755316.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/40432165035.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/fapofifexegigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=onkyo+remote+androidPDF link annotation
    • 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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 10428 bytes
SHA-256: fa32ab80df07b8e2194768cba80144f46cc17b0816d888be886d14d6ca7ed04c
font_01_sfnt_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 18468 bytes
SHA-256: 26741af1d21f33dcb43be33dc8334b70681f42c7dea88b47a5ff6f12a182bc55

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