Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea733d69a923ab0e…

MALICIOUS

PDF

90.2 KB Created: 2021-08-07 17:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43f5eab298944eeabaccf68a06dd22c9 SHA-1: 1201c786a7588767f4f1578b26aa3ba1b476b384 SHA-256: ea733d69a923ab0efefd0c7050d2072b4a0db8bb365059781b094c0678691796
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/torujominenufiwedam.pdf
    • https://marljivo.hr/UserFiles/files/zatimodewikaru.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/76c0fca9fa9b3c00a3e1d6fe96371156/wesisakimelesulew.pdf
    • https://gencerenerji.com/resimler/files/telelo.pdf
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/jojolasibuzas.pdf
    • http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/fikepusuropowaroxuxogujo.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/9qeo4ljo68b64ijsjtg3bjrrc3/jiwefiwuvalo.pdf
    • https://tecnicadovolante.com/images/file/38501508002.pdf
    • http://kapsalonvogue.nl/files/file/19311659157.pdf
    • http://janjoling.com/public/ckfinder/userfiles/files/sixozibunojomuzivubura.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210620_2363E27317220088.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a25821e04f0---rugexasojexusof.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a116c877c22---napaforiratozilademodiror.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e234fe96---25579583686.pdf
    • http://niszczeniewaw.pl/userfiles/file/zusakudazurem.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/121fec195efe281f24454cf525ae04be/51362541403.pdf
    • https://sportyou.fr/ckfinder/userfiles/files/sumosotami.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/aed8c8f113d08adbf67e8aa4e25b5295/90763105407.pdf
    • http://alexlunacoach.com/img/editor/file/83814041053.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/89207326349.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/21766e730b8800aba386f71d658b8950/pefufutomaravali.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610de9207c110---81514816431.pdf
    • http://artecgroupservices.com/imagenes/file/rewoxujitenus.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/7dc9c9749da46b715b2e353c93deb360/32751104270.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/91867455172.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/9c72244ee06fca464e45d411d86feb58/jekovorefokukoji.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a51a34ad932---88014982798.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=suncast+auto+rewind+hose+reel+costco
    • 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_off0000fadf.bin
96b2b764721c5ea11d4f087dbd66bf40208d4def661da66281b9a7d37e31c2de
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 17796 bytes
font_01_sfnt_off000129c3.bin
eefaffd6a6ca6b1da9033d9f36574695249715a5552aebe6b31b20c664fd30e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129C3 10728 bytes
font_02_sfnt_off0001426c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1426C 16792 bytes