Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce59b56e012c5c3…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 11:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c8c8d8bbaa73e6b7047bc4f2b1100d1b SHA-1: 6df589fee4259734efb277876119c72f9654adea SHA-256: 6ce59b56e012c5c3bf8ec6aaa9db4f5e64b2812b393702de61dd1539d8ed3602
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm heuristic, indicating a deceptive attempt to direct users to multiple external sites. The presence of a 'download button' lure further supports a phishing or malware distribution motive. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a dropper for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fantalife.nl/userfiles/file/57477056271.pdf In PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/76670964162.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/99829396737.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/74166505113.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/98132752879.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/18242926450.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3293974300.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/55379510274.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/dugefuxuvixolet.pdfIn PDF document text
    • http://stylekd.ru/files/57943342401.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/bozojevogozekubegakuf.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021916183704676.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/60350548937.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/lukawuz.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/91701069193.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/90278503622.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/80787891657.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/33125502271.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/51248010107.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf178b0427---29722397702.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/13555590343.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16142865ec92e5---lunew.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/45956798037.pdfIn PDF document text
    • http://chinalabware.ru/d/files/vuleg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=mad+gunz+mod+apkPDF 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_off0000e073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 17452 bytes
SHA-256: 803d05a996267196428a208e0e9339c87eda746e66196d1f9b362185693e3392
font_02_sfnt_off000125a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A9 10344 bytes
SHA-256: 0ce4b688498d664bd7167724b1b1b341bb24413323da13c603e64d55bd82a59d