Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eae256c2aad2b62…

MALICIOUS

PDF

79.7 KB Created: 2021-09-16 03:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bc35529fc9893817872b5dd566bdeee7 SHA-1: 8b58916ab041cfe0ad0a2c643fd23af117286aef SHA-256: 1eae256c2aad2b62e9b51ec66ae8c358f5dd68685e19967ef95fc3c087257c1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to a collection of other potentially malicious files or phishing sites.

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 http://potlista.com/file/files/56527544476.pdf In PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/wevebaw.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210910202243.pdfIn PDF document text
    • http://coachhouse.info/assets/file/lonirobiguzupinizup.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/57653427087.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/64878210779.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/tatirafavupulifademokoj.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/67133968050.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb1b4d6ea7---55517857064.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/fupexopedalodosawetenuzi.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/42420888375.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/91856118314.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/lukezogubuwelawivibezaleg.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/luwebeb.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/zomabawizu.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-6/20210906060839304119.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/18867887310.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109020807483705.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3f9b72669457c0faa16bda3448530586/moposuxedosijipuxotuzupo.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/88464754400.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/34683674164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=best+way+to+get+primogems+genshin+impactPDF 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_off0000d25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25B 11028 bytes
SHA-256: 692933a3356f72d10794bc05640965cc721798f173751f8f14dcb9eff2494df6
font_01_sfnt_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 17640 bytes
SHA-256: ee75c33d8f17df69285e344b4fd3b66018ff5eb60dd0fa979a822a3828347590
font_02_sfnt_off00011927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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