Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c571a56dedfc71…

MALICIOUS

PDF

82.1 KB Created: 2021-09-11 22:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2f8e4ca3fb95a96ab6395c4e9a68e649 SHA-1: 416d820a876e6f0b4b675430a99bb971f4da711d SHA-256: 69c571a56dedfc710f4bf4e15a8c6006dfcf8b1c9828aa0572c98323ad884568
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by heuristics as a link farm and potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://marikitaberbagi.com/userfiles/file/87352912313.pdf In PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/66872572015.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/27532979378.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/17091456019.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/734c653992a8a0a1244d1748d7188069/84434744745.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/wexovininipekixeduva.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/42889788050.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/95190096173.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/16696793181.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/11605293721.pdfIn PDF document text
    • http://villkasz.hu/editor_up/podavera.pdfIn PDF document text
    • http://fabtur.ru/upload/files/40679158834.pdfIn PDF document text
    • http://stylekd.ru/files/67892488702.pdfIn PDF document text
    • https://vestol.bg/files/file/17422475873.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/gedoxavo.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/66363648614.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/60467270412.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/36012121533.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/vurebenizotitarobiribo.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/mezepif.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/fumulakitosa.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/6187996046.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/zaleligatukefobipu.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-11/20210911134510593242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=minecraft+all+recipes+pdfPDF 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_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 17368 bytes
SHA-256: 83372a998ec4d57ec32f0acf3ff892cf8e12db5a4ba48b799a5c23acd766d3c1
font_01_sfnt_off00010ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC3 10484 bytes
SHA-256: 4f933d072cbab8696ba89e3c91bf857fab9eb0fa1e4c4b629b927afcb44725c2
font_02_sfnt_off000122b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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