Malicious PDF — malware analysis report

Static analysis result for SHA-256 74731c3c53cc09ae…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 07:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08193aa64071d47ff67e83134447a481 SHA-1: 8cf405ac27a79385efc6f2b6a996f94f017eeb86 SHA-256: 74731c3c53cc09ae182a7568e5d9549b4c534b2bb9cce46a02bc21cd091dfa1d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=minecraft+1.17+for+ios
    • http://vdavloeren.be/userfiles/files/fezebewezedujoker.pdf
    • http://abwnickersonplaza.com/uploads/files/fomuji.pdf
    • https://kibledergisi.net/resimler/files/32944258834.pdf
    • https://easypayindia.in/userfiles/file/tilifa.pdf
    • http://columb-sklep.pl/userfiles/file/xaxukuribufesiridivusated.pdf
    • http://cx-gl.hu/images/files/simotop.pdf
    • http://jawarakreasi.com/file/lowid.pdf
    • https://dampinggame.com/calisma2/files/uploads/31196327589.pdf
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/liputobaliki.pdf
    • http://www.rajpuc.pl/pics/file/wenutanibibifixa.pdf
    • http://crmrealty360degree.in/userfiles/file/galuju.pdf
    • https://stmarys-perthamboy.com/upload/File/wixejaso.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140e17faaeb8---43030974506.pdf
    • http://studio5r.com/userfiles/files/jovawas.pdf
    • https://cjsc.se/ckfinder/userfiles/files/8127050139.pdf
    • http://pcwenhua.com/uploadimg/file/1631697392266783214.pdf
    • http://gestaocipa.com/public_html/Imagens/file/25837083888.pdf
    • http://rescue119.org/userfiles/file/31772213586.pdf
    • http://kurumakaitori-one.com/js/upload/files/59727077310.pdf
    • https://sarenpinler.com/calisma2/files/uploads/90010508775.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210911064828.pdf
    • https://penal-garazh.ru/files/27897443108.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/cunbrats2drv3n62e9ic8mopt3/49503356329.pdf
    • http://korean-school.hu/hangul/userfiles/file/viwisozu.pdf
    • https://sklep-pinokio.pl/web/uploads/files/gexujebegusosemok.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_off0000d80c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 16792 bytes
font_01_sfnt_off0000f023.bin
f3f696402ffc6126b491ce6596d1aa5405c1271008f5d54f1a8091f8af0a27c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 10444 bytes
font_02_sfnt_off00010810.bin
ad649e349d5144a86f14e9d9103241960b4404ebe64b5838b90cb6f54b853a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10810 20284 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.