Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e0034a42cba823…

MALICIOUS

PDF

75.5 KB Created: 2021-09-05 07:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1d08515380c16c1f17a8d84389b3e15f SHA-1: 3ac5bb928347ae4e575107591925bc9fbc6cc327 SHA-256: 95e0034a42cba823e4c06cf0929b480cf9021b5631991610b5f3f59848628a0f
236 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a password-protected archive lure and a browser installation lure. The document body is heavily obfuscated, but the presence of multiple URLs pointing to potentially compromised CMS upload storage and disposable hosting suggests a distribution mechanism for further payloads. No scripts were extracted, but the overall pattern points to social engineering to facilitate malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://dichvugiayphep.net/hinhanh_fckeditor/file/guwixufedejojir.pdf In PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/70781375622.pdfIn PDF document text
    • http://bergepkolcsonzo.hu/userfiles/file/zibijobofopiloniliku.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e575bfa3221---fedupokazoxibin.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ab5d27de---2707659730.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bf31347d605---gulifafimidekenaloga.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/cb14df6f49ccbffe5c22222584731fde/62625416367.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/21592232614.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/vugolure.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/41275886587.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/xixosojepikaj.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/48121266616.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be513c38c31---fataxosujadajetidalonited.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/67450182394.pdfIn PDF document text
    • http://freetds.net/userfiles/file/kotedokudumitixejasaginer.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/20689294169.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/265253044.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/bufeluxomudemiwujidapevex.pdfIn PDF document text
    • http://ruihuitax.com/files/file/98933953419.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/161f4983d2c4db95026729977f47c673/12669513017.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/66254710923.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/10049626394.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607328fbc847c---82958734694.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/katutelag.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/bonobawupaxurazoninepara.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/xevimitiwudam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=extract+pdf+file+free+onlinePDF 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_off0000c536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 16488 bytes
SHA-256: 3f127f4252b41be2272361d3e26a04d1c5240bd257b34570a4bff361d665695c
font_02_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 10532 bytes
SHA-256: 3f1a1dcf4e2be265fdbf11e83b53aabab7b723e26bd94f9ce8fe04079b353c50

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