Malicious PDF — malware analysis report

Static analysis result for SHA-256 d069b50dd9a169d4…

MALICIOUS

PDF

76.4 KB Created: 2021-09-18 19:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1183fdcb2c54096ab265d4bab827f4fa SHA-1: 8b049adac09c5ffc79a9e9e22447877c291c30c0 SHA-256: d069b50dd9a169d42f661644f96c656e21bfadb1bb8fd0553fe18565b6bb2976
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to compromised websites and link farms, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of multiple PDF link farm heuristics indicates a deliberate effort to create a deceptive structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://vom-ragnaroek.de/uploads/file/75702756873.pdf In PDF document text
    • http://avalon-essenzen.at/userfiles/file/12344390513.pdfIn PDF document text
    • http://sapthagireesyathra.com/userfiles/file/13003813697.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614374f3b7f33---xolupogivufasipabero.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/8s39nos4u0t3881o3itr2njgkt/41174838901.pdfIn PDF document text
    • https://sitarasign.ir/data/file/82496113127.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/gqrfgbgtegmmiu8sfajrq37093/58339264042.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/81028403021.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/wipekixu.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/sagomumoveparixuzo.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/2109041521028775003e2ye.pdfIn PDF document text
    • http://eichler-kammerer.de/zululonanup.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16136da8d5bfae---mikuramar.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/45828979511.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210911_D14F922B6C408D9B.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61611779824.pdfIn PDF document text
    • http://vce34.ru/attachments/file/venuzejodej.pdfIn PDF document text
    • http://eventechsite.com/files/files/97401225950.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/watuf.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/somewogukazemexokofapip.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/7466366783.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/zukuxifubopabir.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/bijetorexatilefig.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/13855085866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=kodi+matrix+tv+addonsPDF 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_off0000c3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E9 18700 bytes
SHA-256: 65d57a33c42e821f9fd4d63b59e8053f3aeccd805ca7e5c116a849caf56fc56b
font_01_sfnt_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 10392 bytes
SHA-256: 2b0ad5f809e134732d3762fd818793707a5210d31a27bf4bc7b312be8ef8b205
font_02_sfnt_off00010c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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