Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccabd4a6075fe84…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 20:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80c879062378567a3c979ac69f41ddd8 SHA-1: 5c8298576d536ce8c11951185b25c0e13c976aa1 SHA-256: 9ccabd4a6075fe84ff12b8264d14d6933d77c86b2a74ac5e174cc0b7c1bade19
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple PDF_URI heuristics confirms the nature of the document as a collection of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mineraux-et-lithotherapie.fr/ckeditor/upload/files/nexiwijidurunoxodiwowe.pdf
    • https://felixtrail.com/imagini_ws/wijarajawumekavezu.pdf
    • https://rusepress.com/uploads/wysiwyg/files/wemexodorobaxul.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b901f9db6b---rodukodu.pdf
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/70548497936.pdf
    • http://f-kcc.jp/user_data/userfiles/files/taxinojurazipokipotelab.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614564ab65eff---58458608811.pdf
    • https://virtrade.gr/userfiles_lybo/file/fesemilore.pdf
    • https://venefoil.com/ckfinder/userfiles/files/61976938814.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/53v3fsannta6r7r3obudr8id8a/zubibu.pdf
    • https://servicepapik.ro/files/60981898204.pdf
    • http://carbonelite.ru/file/sujalewufasaviwivomejof.pdf
    • http://viprealestatebrokers.com/userfiles/files/bifemeja.pdf
    • http://schodylux.pl/userfiles/file/zadenifavitomepigevom.pdf
    • http://woodbridgeabw.com/uploads/files/87899276332.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161360dbd7c259---81661840964.pdf
    • https://currenwatch.myhost360.cn/file/upload/files/09-18-18-44-22-61.pdf
    • http://studiomarcheluzzo.it/userfiles/files/88449218794.pdf
    • https://fetogram.ir/images/upload/files/mumef.pdf
    • https://adikkeempat.com/contents/files/xabem.pdf
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/mujomefobabuboxubakoxomef.pdf
    • https://steammining.com/userfiles/file/kuwasalifitukinotuviwumi.pdf
    • http://zlzljc.com/uploadfile/file///2021090113121789.pdf
    • https://calienglish.com/ckfinder/images_store/files/vamowazekopejupofobu.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136dd4deed2e---tomekudafakizukaner.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=power+book+2+xmovies8
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 16792 bytes
font_01_sfnt_off0000f534.bin
608aa6a06a391af6efebe57ca258538ebc118c51a84b1ee276973d5d3e7a1a3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 10676 bytes
font_02_sfnt_off00010dd8.bin
70196c38087a7497ee57eee0701b0aa13870c1ec25c5c25f8281b440d54f5107
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD8 17084 bytes