Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f30eccf0c517ed2…

MALICIOUS

PDF

77.9 KB Created: 2021-09-16 20:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6997986d8f000fd2c595ce09c5dda16 SHA-1: b624eb1f029a5192415d903374effdd090533f3f SHA-256: 7f30eccf0c517ed235a962e31ada4bc43aa00ae72f605b8b8428bf397e5de908
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 hosted on disposable domains. 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 the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://pistant.ru/uplcv?utm_term=law+and+order+svu+season+13+123movies
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/wukorixujatebefelo.pdf
    • http://fertilityupdates.com/userfiles/files/giwazutep.pdf
    • http://kosmonautika.ee/ckfinder/userfiles/files/83610572726.pdf
    • http://sovaimm.it/userfiles/files/8749493886.pdf
    • http://bong-dem-long.org/upload/editor/files/7563785176.pdf
    • http://usagimatur.com/files/others/pazer.pdf
    • http://tropo-design.com/ckfinder/userfiles/files/20470342891.pdf
    • http://www.pacautomarketing.com/file/melatebazumepajemuvezinu.pdf
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/17969225421.pdf
    • http://www.vandiestbrandstoffen.be/uploads/files/21076552980.pdf
    • https://nucamsa.es/userfiles/files/10944202094.pdf
    • https://vegas-shop.net/uploads/files/tefobonedirowar.pdf
    • http://ncdesign.it/userfiles/files/97648178075.pdf
    • https://hanomanberjaya.com/contents/files/gewapopinoxuj.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f6391ca68---64087418234.pdf
    • http://velapower.com/glwh/UploadFile/file/2021090519453773499.pdf
    • https://zohopin.com/calisma2/files/uploads/16494021138.pdf
    • https://datenglagi.com/contents/files/tupopavapewuf.pdf
    • https://appchecar.com/ckfinder/userfiles/files/21774611333.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427e4d02d7e---forasubaxekujibuxovi.pdf
    • http://kemnhapkhau.com/upload/files/tirosotowi.pdf
    • http://wakabaeducation.com/userfiles/file/7985871593.pdf
    • http://alpinist.store/sribati/editor/uploadfiles/52977242314.pdf
    • http://clinicaveterinariagussago.com/userfiles/files/kixepizaruzesaxuro.pdf
    • http://tivatijapan.com/uploads/userfiles/file/xudewivujovob.pdf
    • http://ingpiazza.eu/userfiles/files/vitiwige.pdf
    • http://brkvinc.com/userfiles/file/siwutulazozifafe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB0 16792 bytes
font_01_sfnt_off0000e2c2.bin
176a2a39af8c4f584e6bda09d7321f31952a34ec674e9f314293b71b60fedebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 17672 bytes
font_02_sfnt_off00011077.bin
143f5f5168599b25ec54ce90034a1cb0c0c9433825d4661ee08d6a5213603fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 10820 bytes

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