Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c08e3f307308f60…

MALICIOUS

PDF

70.8 KB Created: 2021-09-28 08:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9b7b48c319998f9a844dac815e834881 SHA-1: 2fced0e06f5b3e84e1540b5547be6bafaedef979 SHA-256: 8c08e3f307308f60a6d8c86526d640e468a2073e434538d4edb619a4143df133
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, suggesting an attempt to lure users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 https://agrilaui.com/userfiles/file/51963765746.pdf In PDF document text
    • https://doluhosting.com/calisma2/files/uploads/gupotebewako.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/katulafu.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/sobezewemugiseba.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/gugaxigezifuwizom.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210909025216659.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/jativojiforuzixumowi.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/doxamokopazawotofomemajaj.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/silekuxosuxilajobalomadak.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/getukivewotaw.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/80716064203.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e960dd6ba---rupiwapibaxafik.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/minetavaxadimilup.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210916081705.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/vimagamawagesatibukime.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/gupukajovovatizupoluseso.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/62647821280.pdfIn PDF document text
    • https://henuopack.com/d/files/55681100093.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/421129921.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/lifibadijulixaruxeroko.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/94265089191.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/wiloguturasegob.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/namuxives.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/nebaxusisikukofigetetize.pdfIn PDF document text
    • http://sdes.in/uploads/gakamorelijijufunateg.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/53967763595.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=harvest+town+mod+apk+android+1PDF 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_off0000b163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB163 10796 bytes
SHA-256: 34f23b0fe08d1df7019575a86b80d029ac31b0ba267006a16a8fdd207642c3ad
font_01_sfnt_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 16920 bytes
SHA-256: 9c6639505093d86457cfc9c4e78427416a1bb9031a4abfd28111ff8268d2283e

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