Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f9ee2b74fce1f4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 00:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 463aa44d1f59f7892e44fcb8780c0eef SHA-1: 9d339f4a2079a909113319dbe00614e5399f092c SHA-256: e1f9ee2b74fce1f40376d84fe094d22f119c79ba0b0df0c62caf7d2bdeb8d09c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=shows+for+free+apk+download PDF link annotation
    • http://bukharageorgia.com/sites/default/files/file/14298663491.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/fevedumivodubumatanasiwip.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/pugukikubuxadupifoz.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/popegaduxudimurumesimap.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/13753067247.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/dirigadivejeru.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/vamavikusot.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/kelat.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/73508326344.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/medodalolutodigoz.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131740fd924b---84615345716.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/pupokut.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/nezevevi.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/59053371607.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/34435200047.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/gusixiweninasa.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/54332536340.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/xutinegofavazam.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/24873225644.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/65978321516.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210903212549.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/kemudoduvibujibesetuf.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/81814072314.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/sivute.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_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 10660 bytes
SHA-256: 1237a5aff4088fcea4726c981f6319d204958e2ee06646b8193a980d93e81e10
font_01_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 17832 bytes
SHA-256: 3fa44c97af289342d0c3a1f4e24691851b57988d9a50fad77763573040a8ee00
font_02_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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