Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0f32c05c6edec7…

MALICIOUS

PDF

80.9 KB Created: 2021-09-11 21:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e692826bac3e7b89ff329d8da4818b75 SHA-1: 0aa1b74ac3b87442a1e1b7a9463a803732b719bf SHA-256: 0d0f32c05c6edec73b0ac3d03c21b26a781832b78874b79770e50cc2c25b6c9f
166 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ClamAV and a machine learning classifier. It employs a social engineering tactic by presenting a lure to install a browser extension or update, a common method for credential theft or malware installation. The document contains numerous external URLs, many of which point to disposable hosting, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of external links and the lure indicate a high likelihood of further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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
  • 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://smidgel.ru/uplcv?utm_term=how+do+you+take+safe+mode+off+a+tablet PDF link annotation
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/wizekijamobirizaxuka.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613556d9d1222---78485765953.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/24445697030.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/tubupekuledut.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/sogutodasajamesenumirewun.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/32000471061.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/54665275696.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/37187405553.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/fajilo.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/96014025072.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/80140749812.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/metunufigutoneju.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/retewomefeso.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/81945895237.pdfIn PDF document text
    • http://kodemari.info/data/files/44097048415.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/vosovepilol.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/gagumuwasaxitomat.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/pusonisodusidewusapis.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/vezuwerib.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/94997397319.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/texapono.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/muvoxagujumaja.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/darusexuf.pdfIn PDF document text
    • https://bliznacite.com/files/36478028059.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/80284203109.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_off0000d85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 17276 bytes
SHA-256: d72ea746da6b1a3d92e9f17a9c803763fed2201acbd1cda253292eb8efaee3bf
font_01_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD5 10740 bytes
SHA-256: ce14109b7d2771b7781d3b583668f394171594cac672a35429356509a979bd57