Malicious PDF — malware analysis report

Static analysis result for SHA-256 7625329d3e68823e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-21 13:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e639160b36a09ac364aa4c5f7fd2e041 SHA-1: 318409eb3abe99189ba551b26f8c4e2a1defd206 SHA-256: 7625329d3e68823e88061e57a3285fdb8906ee1e2f472d4a1ccc028ea452249d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://mps-india.com/userfiles/files/buvutanurogitogedi.pdf In PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614649ee753a0---63171814938.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/vizafevadadujadojes.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/37226679970.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/jizusafukumepanibofenaje.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/64676926805.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/jupiga.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/pisizituweforap.pdfIn PDF document text
    • https://euchebnici.com/img/file/55211775172.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/18190203023.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/87889723440.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfded9b32c---24241266089.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/tumirasomeri.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/16057041747.pdfIn PDF document text
    • https://salonrewards.ca/images/file/74515098336.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/bokudunulipekavu.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/rizoluke.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/fepefimugoxatuvopu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a45e4fbf2---89075522407.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/53419551550.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/losisizekasibifumege.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/genoboxazo.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/ziwogodugomivexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=update+for+android+isPDF 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_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 10452 bytes
SHA-256: 31ef46ea214703b065ee31b1355b548d0e629bea38d16043ebbb8569b32a0278
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 18440 bytes
SHA-256: 9ccee338a8e0f2d38f710776184bd1d03feee97539f9aa8f52d5d607503103f1
font_02_sfnt_off00012926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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