Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c2a7cbaec83807…

MALICIOUS

PDF

83.7 KB Created: 2021-09-18 13:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: eca84f6c134a46e676d1214a827d5c6e SHA-1: ba360faa55984e1996332242ba534643c5a167d4 SHA-256: f3c2a7cbaec83807920f387f164fdd37445b5f26cebd8ce832c15b6a2b9db03f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs such as 'https://infrive.ru/uplcv?utm_term=ice+cream+3+outwitt+mod+apk+download', which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://infrive.ru/uplcv?utm_term=ice+cream+3+outwitt+mod+apk+download PDF link annotation
    • http://melly-incendie.fr/img_db/bemewizijiwitovataloda.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/4b0e23a8a012395414be07fb8350b7d8/mapojezusuraw.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/55514120198.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/bexokedefo.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/jesexoxetajegetovidujo.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/61379722036.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/50538124911.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/42639815205.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/sekusagosenunuwadoj.pdfIn PDF document text
    • http://badgerhillfarm.uk/vefaxamuferisalufemineke.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/64412456010.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/xusofipeziniditezile.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/ronoripipadarokuxob.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/2987476792.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/65486191064.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/34443756196.pdfIn PDF document text
    • http://zatacorp.com/upload/files/66917602028.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/zanilimitufe.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/jogisadekivifidexejewobiw.pdfIn PDF document text
    • http://jinyezi.cn/upload/bakogejimovedep.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/xeronefif.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/25031675237.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f15fc3c79---47139669169.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/69315570028.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/78996657591.pdfIn PDF document text
    • https://lapdonline.org/file/71772736793.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_off0000dbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD3 18996 bytes
SHA-256: bb6801f4f05c3a7959a425d09b2bb3e2e5a993c08cd3dbfa32786b0746a6db2b
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 10908 bytes
SHA-256: 56289cabc467ce891701adb551d8238da986803dc8c6c2a205917398e848935f