Malicious PDF — malware analysis report

Static analysis result for SHA-256 996999e5a50d7d42…

MALICIOUS

PDF

84.1 KB Created: 2021-09-17 11:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02a8709b2d15d255a9297ddfbb25f3b0 SHA-1: 18d17e4e383ec8718cc68b390273b6ff95d949ae SHA-256: 996999e5a50d7d4276bd0ca044219b60bf05c2534469b164b1f10338121dca87
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and a link farm pointing to various websites, some of which appear to be compromised WordPress installations. The presence of a 'download button' heuristic further suggests a lure to download a payload. The embedded JavaScript is likely used to facilitate the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://mimpishio2bet.net/contents/files/forefavolebidum.pdf
    • http://studiotecnicolamanna.com/userfiles/files/62650778082.pdf
    • https://taperagi.com/contents/files/47743384852.pdf
    • http://pactolous.hu/upload/file/36405720778.pdf
    • https://gitedu.in/ckfinder/userfiles/files/38814211030.pdf
    • http://cardealer-space.com/js/upload/files/63956908477.pdf
    • https://birsamundapark.in/userfiles/files/zuxivukidegamegurek.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/79eb2110dc5166a4cda688ed9aa999f0/71925131852.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/10f7758692f42b843decbf7d79ccc0c1/19730886556.pdf
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/zowuverixikesuzevolafad.pdf
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/88098927165.pdf
    • http://noithatnhapkhaugiasi.com/luutru/files/bifefunigodezida.pdf
    • http://kristiankutschera.de/userfiles/file/kanasegenevalezibolosi.pdf
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/taxelateramod.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c9e1bcbf---putuvuwarek.pdf
    • https://helices-evra.com/userfiles/file/venezilewezorodon.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/fekikizeg.pdf
    • https://ww150007.linebot.net/upfile/files/20210915153850.pdf
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/petomirevobovigigabubuges.pdf
    • http://architettotoma.it/userfiles/files/5600019755.pdf
    • http://dlzhrjd.com/images/uploadfile/files/kotarelexenunegi.pdf
    • https://learningsolution.ca/userfiles/files/69508072653.pdf
    • http://hondaototanan.com/upload/files/jukorevetaradar.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136111884962---kavekinosapakexapezarosig.pdf
    • https://anaksemut.com/contents/files/53689568317.pdf
    • http://weiddy.com/uploads/files/202109141257405141.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=oh+my+kadavule+movie+download+isaimini
    • 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_off0000e3e0.bin
bd637a902abc665ca56b867c857df575f82e03df2c7aa0f4dddbb3af6710852e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 17692 bytes
font_01_sfnt_off00011120.bin
b47424c01054e3f07e69c89eb028dcc75df23cd8bf0f1ecc16b6b7d6e6f77f58
pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 10800 bytes
font_02_sfnt_off000129e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 16792 bytes