Malicious PDF — malware analysis report

Static analysis result for SHA-256 206e5f13c5df5176…

MALICIOUS

PDF

75.4 KB Created: 2021-09-16 23:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2bb7e34405084745857a854aa03f02c6 SHA-1: cfe767bef9ef944b93dc2d0c11a52ec0022e8c32 SHA-256: 206e5f13c5df517635ec200f1e610a143317aee3b2fdb6be473977b68932f783
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing or redirection attack, potentially leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=how+i+live+now+123movies PDF link annotation
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/73f94567422326ba6057d5f697416918/gigabel.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/41661251493.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/29325412115.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/jazotikajuzirawofirovaxat.pdfIn PDF document text
    • https://go2germany.ru/files/file/fewotoza.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2021-9///2021981453377789.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/82678866233.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/11947348955.pdfIn PDF document text
    • http://blgjad.com/upload/files/56093205490.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/99070269648.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/gewavis.pdfIn PDF document text
    • http://wuchem.com/upload/files/49916294022.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/lenem.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/sarobijuw.pdfIn PDF document text
    • http://blgjad.com/upload/files/xuvafujuzewibozo.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/83489546382.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/35046973750.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/xujupodanonigevuz.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/95930376751.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/12339608975.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/87619918901.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142387a4e266---17245864063.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/zapatosi.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/18596291204.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/10002299081.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/mupomoderumoritesagigutil.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/5088710778.pdfIn PDF document text
    • 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_off0000c37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37D 10396 bytes
SHA-256: e31d16a1810207e61497ebf9b253119e65d298be1a13d92e03afe1ce237d0da7
font_01_sfnt_off0000db15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 17296 bytes
SHA-256: 27454e1df780d29a145aac409df1840548a67a61da23e12cfefe249128248c2f