Malicious PDF — malware analysis report

Static analysis result for SHA-256 3227f4ca5e971ff3…

MALICIOUS

PDF

91.2 KB Created: 2021-10-13 00:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4b832235e8d7ff1f0d981a0bafe5f171 SHA-1: 3fda803c6eff4caa98704063f56dfad4d58e9c2f SHA-256: 3227f4ca5e971ff3e0f6eb92ce1fa165f95516646aac98a63d0b0c09a96eb28f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URIs, one of which points to a raw IP address, indicating a potential redirection or hosting of malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that the PDF is part of a link farm, likely for distributing malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://on-video.com/movies/movie_data/file/wapakora.pdf In PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/35236949719.pdfIn PDF document text
    • http://home-plast.ru/foto/files/86516013401.pdfIn PDF document text
    • https://hgb.se/filer/file/venawugazamazidemolu.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/nuvitovipemufoxo.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/serazekupeveserozevebuvod.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/6536865580.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/32591245868.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/40966136467.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b59c195d16---37306727590.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/wuzewof.pdfIn PDF document text
    • http://ttc-investco.com/img/files/fapofoja.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/vaxinubixawi.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/ruganebepilomavuwomewetig.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/27438245719.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/28781915892.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/40797791806.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1615057df3121a---82258898260.pdfPDF link annotation
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/dlj3670mkvuc030fhkuvgqrsu2/zuwenuratupuponagesulewe.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/44371966309.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/61815686949.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/59848246290.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/xajawokeburedavemizetem.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/7433186683.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/23D8k0Ec_6w/uplcv?utm_term=thumper+bambi+quotesPDF 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_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 10716 bytes
SHA-256: d20dde1098ac82734fa39cd4df517e83eb62e0b4fd24e1422170d67122f62951
font_01_sfnt_off000110a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A2 20728 bytes
SHA-256: 81857ceeddff686d461e37e3fc10840a73eff1cf6f76c336975a0325af50e712
font_02_sfnt_off00014741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1