Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f2558049e53854…

MALICIOUS

PDF

84.2 KB Created: 2021-09-09 20:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e9ebffa0db0b0b16bf7681290c22ed6c SHA-1: e9d31441b22d9cb4c6aefce5f93ed456801db217 SHA-256: 24f2558049e538545ec1fce1a5a3c2428762df2b0c07609ecf40d326c7dc6d54
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. Heuristics indicate this PDF is designed to redirect users to external sites, with ML and ClamAV classifiers strongly flagging it as malicious. The presence of embedded URLs and the link farm structure suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=chamet+mod+apk+tech PDF link annotation
    • http://flagrant-desir.com/userfiles/file/mereno.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/dixajimugigulavozebusabo.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/rijideranuwovezij.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/98732684490.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/19186038224.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/70eshcpl9fb93bp0l815kt7om7/97804022862.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/62364520726.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/tenoxelikaxux.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/tufurabarolafuzisim.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/11051834527.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/masef.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/nebazodazazafolosukof.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/17650839396.pdfIn PDF document text
    • https://coluer.ir/documents/file/masuginu.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/kegolifoj.pdfIn PDF document text
    • http://strandedtattoo.info/file/pujajaxotakovuta.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/mirikokor.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/39256725de9ec74bacd2e8dbdd78a246/povidozojakawe.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/lisokojagivaxovof.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/50349100957.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/xirunopigorelekepo.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/kumogudijajufugasose.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/ropusariwime.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/widiguf.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/35204489377.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_off0000db53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB53 10392 bytes
SHA-256: ee98fb2872624d9d8ae859c9039caa5b8586b1f3c6f300e11717ad0a377345b5
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 20916 bytes
SHA-256: 5a8fe082c13b5cc3f370f3ad22a5b546efa6ab072635a599506d6ceb70d66540

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