Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b32fdbbf4fc652…

MALICIOUS

PDF

87.9 KB Created: 2021-09-18 07:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c203b5dc92c8ffb373fdf3b187529366 SHA-1: ccfdba58b5f985241e84bedc925292019a5495ea SHA-256: 93b32fdbbf4fc65296d73e97422a40c9605d5750ee379a83c4a123b146e3a1b2
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 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely serves to redirect the user to one of the numerous external URLs found in the document, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136cb5155988---49440904615.pdf In PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/gugumetok.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/majotonamatilivusaw.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/48755605122.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/82383479662.pdfIn PDF document text
    • http://secretinvitation.net/images/files/papimitupe.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/48466262829.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/36847775875.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/82714528720.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/46707152945.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/40834545483.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/70571292874.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/rifuvitowusuvowalositeg.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/45758631987.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/raxujejudepo.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/53396058393.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/tedafawiduramaru.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/141009333.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/nuniz.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/12950754431.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/65169033014.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/nawimuwulufuzo.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/tafodizexuk.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/36i8rprg0rviqge82631olvgem/23721311639.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/78983735376.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/rowakizujixejinedusim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mkv+movies+apkPDF link annotation
    • 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_off0000f311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF311 18248 bytes
SHA-256: feac0f14020def4a73e613c24392dd837c4fbc297a8f9fe1bde94bde1240cc4e
font_01_sfnt_off000122db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DB 10216 bytes
SHA-256: a83951500e672fc11bfbdc7e146686ed289193934d5e98ffd5dd9f6ce8904af8
font_02_sfnt_off000139d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1