Malicious PDF — malware analysis report

Static analysis result for SHA-256 296bb0605ad37cbc…

MALICIOUS

PDF

73.3 KB Created: 2021-09-15 09:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 80aaea7b3d48f6ad65b27e80ac3f491f SHA-1: b3cf1393ae9bb95dba71e12d844a7e776682064d SHA-256: 296bb0605ad37cbc22875eb516c80a4cc304f8d03a16ff53d81c69d3663a4d3f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://crysiq.ru/uplcv?utm_term=pes+2020+apk+file PDF link annotation
    • http://alompar.hu/uploads/content_files/files/detunofudanugerikunomid.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/1015630518.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/relatiwisujo.pdfIn PDF document text
    • https://riwg.in/userfiles/file/33085329935.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/58436671869.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/11599077889.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/netid.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/77752007908.pdfIn PDF document text
    • https://nasikampung.info/contents/files/giwivojutikevile.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///nexifafibum.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/wimomanivamezozuk.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/wapupovizapajasebutipajaj.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1630642580.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/lofanikalawan.pdfIn PDF document text
    • https://bor-diing.com/upload/files/71963748294.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/61860415696.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/8d6df7034ae9691b51f1b94e43ed0df5/55682206316.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/revebopekitafodarud.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/gosifalukum.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/pewokuwatetujusajajubid.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/17426378488.pdfIn PDF document text
    • http://kahasat.cz/data/file/46296963114.pdfIn PDF document text
    • http://gzwep.com/img/file/2021910124359.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/83378610066.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/46587959740.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/kegopofuzanijijab.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_off0000bb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6B 17456 bytes
SHA-256: fb27c61f7b546d390c3e96a9747a92e6b718d3d8e4bbad6eaa4efbcb2cfb7059
font_01_sfnt_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 10264 bytes
SHA-256: 6fcd955604905e69b2c5654a229051efeb403f17d0418f417ebf69b646751330
font_02_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1