Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d218ec2c27e018…

MALICIOUS

PDF

74.4 KB Created: 2021-09-02 03:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f8a75aeceea6dda55ed6fe27ec25a5fc SHA-1: 822d8e001846deba1d24390a3b365100254f00a1 SHA-256: 06d218ec2c27e018bd53f5d13f390eba57d97bcff16faaf42593ece23f038b56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://huntic.ru/uplcv?utm_term=baby+pink+number PDF link annotation
    • https://takipbizde.com/calisma2/files/uploads/bogixelufizivafe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd77acbea---viroxemefirobaxowijakawa.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe772e7e2b---pafusumojiranexi.pdfIn PDF document text
    • http://desertofohio.net/clients/4/43/43f38f6e2239b09326489e1ba67fa1b6/File/24205495402.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/dapofuzap.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/sojinox.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/76828839231.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/81063014603.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c8995b201a393fe4733abdca2a6b9a3b/rizoduwugovavokemuxun.pdfIn PDF document text
    • http://faradbox.pl/files/file/silebolasunit.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/28471772397.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/58620906100.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/57588574410.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/64361743335.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210716_AC6D069A2B6888AD.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/78494054781.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/tanidinipubupefa.pdfIn PDF document text
    • https://olterus.info/contents/files/70058593381.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c78c9d625---63535075256.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b1901593d3c3b9afe64f7973eda6f4ce/4056055990.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/lobazulemafefapaju.pdfIn PDF document text
    • http://atomleasing.ru/media/File/sovopudos.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/dotixubenufazibaforewevu.pdfIn PDF document text
    • http://www.polni.si/Images/files/zemixedet.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/dexujigorujiduwov.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_off0000c140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC140 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD952 16588 bytes
SHA-256: 35c8fd7612c585b2528353e50fec61999ce11023dc0f743ee4860dad248a7b9b
font_02_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 10480 bytes
SHA-256: 88794092c2ce78cf5b712d8ebe1418f17ac898238bdab2264db8a28dfa1412a9

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