Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7f3a4190866996…

MALICIOUS

PDF

91.9 KB Created: 2021-09-12 09:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 991a0657a280c326710729ae2e518ec1 SHA-1: a7334467ec68a97c6ce4761d0124be8e55c43d5e SHA-256: 0c7f3a4190866996f5f053e97fdb62d01544eb2ec35519f0c3c1b79a3c9df4c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a common tactic for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=movierulz+war+movie PDF link annotation
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/95539748926.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/85779419916.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/31793140394.pdfIn PDF document text
    • http://shesob.com/file/files/zuregimanewumezageneni.pdfIn PDF document text
    • https://geniodelweb.com/file/54047881213.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613942801cfa4---xukomizonixupefopomovumel.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/ratagabafejexudaf.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/davari.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/nepizipamozetesa.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/rovusasetusasu.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/zegotif.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/fajogamoratokatukox.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c483c57bfb---77153925961.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210908_212503.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/mebazifefusisezok.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/wivogepejumefekej.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/21736031911.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210902015151.pdfIn PDF document text
    • http://normel.org/files/upload/file/zefab.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/tofuj.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/10369120485.pdfIn PDF document text
    • https://gornjastubica.hr/files/8502750473.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/nidatupuj.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/buxulewadabugases.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/17993605766.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_off0001059c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 17456 bytes
SHA-256: 3d25d7cbc7a1dd069bb50a19c42bc2a4e6d226e1d7e8de7dfc0c6388c97bb54f
font_02_sfnt_off00014b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2A 10204 bytes
SHA-256: 452d96fb072e9b8bcf58905e8e00f460f95282a7ee49b3e3cf8af725f669f9bc

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