Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6396fb6f86341d…

MALICIOUS

PDF

84.4 KB Created: 2021-09-22 12:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be8f7055967bd36c60686f7a2a744565 SHA-1: ed5fe8a971f4ea1a359c829a962bdffd9e8c44e8 SHA-256: 6e6396fb6f86341ddcaf39c3250ae9d7d0d0d95686ea002bf1631d79cdc6a02c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs, many of which are hosted on disposable domains, suggesting a link farm designed to obscure the true destination. The presence of a 'download button' heuristic further supports the idea that the document is intended to trick the user into downloading a payload. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kemenyseprosiklos.hu/upload/file/tovovofuf.pdf
    • http://giasuthanhdat.vn/Images_upload/files/86421604695.pdf
    • http://f-kcc.jp/user_data/userfiles/files/ruraliv.pdf
    • https://digireg.cn/upload/zizafaganovafo.pdf
    • https://magerp.org/upload/files/voxivaralejuxumaka.pdf
    • http://e5tbr.alruaa.com/ckeditor-ckfinder-integration/uploads/files/87138260751.pdf
    • http://smolninskayahotel.com/userfiles/file/dedurexatofavewovabogo.pdf
    • http://fotografieindex.nl/images/uploads/bejorozozixebakumulalipu.pdf
    • http://chongthamphucthang.com/images/news/files/30450426656.pdf
    • https://htcpost.vn/vietpost.vn/img_content/file/panisurexuk.pdf
    • http://ivankotov.ru/img/lib/file/wixiduf.pdf
    • https://yasacompany.com/upload/files/wuwivakekoragiluter.pdf
    • http://retco.ge/ckfinder/userfiles/files/zimomazutegeboniluzaxonal.pdf
    • https://rts-wm.com/ckfinder/userfiles/files/mikepovukefoxufoxed.pdf
    • http://tianfonmm.com/d/files/52516457006.pdf
    • http://emblem4home.com/UserFiles/Member/File/zarupixu.pdf
    • http://learnazia.com/fck/imagesfile/poviteluw.pdf
    • http://degrossier.nl/uploads/file/satijugorumumijo.pdf
    • https://heritagecambodiatravel.com/userfiles/file/dajaxed.pdf
    • http://studioferrato.it/userfiles/files/gazuba.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/f46df664e104e13762c69fef23ea48b4/41561389746.pdf
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/8168723691.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132dbe8542bb---97404352991.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=kabir+singh+movie+download
    • 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_off0000e632.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE632 16792 bytes
font_01_sfnt_off0000fe44.bin
991b881bc10c88924289056528c6d81f3c8c7a3e9dbbf8d9ab9facf98191fc22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 17256 bytes
font_02_sfnt_off00012afa.bin
b3956b70e5197e7db226d507de84ee40f9ed5fc2961f41a9ac53daaaf2e98c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFA 10880 bytes

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