Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce17e4674f3a4e79…

MALICIOUS

PDF

83.1 KB Created: 2021-09-14 11:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 75581ba4baed76fa6d0437b2945a9339 SHA-1: 5993ab0c4a607a859bae4a62265502a964af7662 SHA-256: ce17e4674f3a4e79af800dc441662f396cdd89fc8c65a78b3e1e5799bfd6a596
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings indicate external URI redirection and a high ML score, strongly suggesting malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=hyundai+android+auto+update+australia PDF link annotation
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/89681827571.pdfIn PDF document text
    • http://glassick.com/userfiles/file/92573381074.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/xedopovabogexetepi.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/xaxupuwutavidunosegiwale.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c3b53b6e---84300205824.pdfIn PDF document text
    • http://sudeoksa.com/userfiles/file/20210908175848.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/luximusoturog.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/rowefawavagubajutiraxowal.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/sipaledofoxuxupigi.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/gufuzesobewosirobo.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210904032133049678usv65.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5ee5b2365---nanilovutar.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/noledunebozupan.pdfIn PDF document text
    • https://ip-pharma.net/data/files/8180135970.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/50933774071.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/kadibulofekanuxomoxozax.pdfIn PDF document text
    • http://hueide.com/upload/files/xegozesewi.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210910_BCD7A5345FECADE8.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/77330725199.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/47812952290.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/bumogojorakikokerakebadil.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/xaduripitaxomabog.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdc1eb0fc1---jenijad.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/napujorurupegurirotijup.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/rexesoro.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_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 10592 bytes
SHA-256: bc7596c80a21ca624d3f67cb3068a48cf900e3fb8c3f76e5d240c8fc816977da
font_02_sfnt_off00010fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDC 17944 bytes
SHA-256: 762994b8fdc31151254f16b0ad60fb1a2ebc6b9cff804054a01e756fed82781c