Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8927be6503362c0…

MALICIOUS

PDF

78.8 KB Created: 2021-09-21 05:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6846ef2b84fd2483fa4262828ac47b5c SHA-1: 1ce896ce86c0680e7cf6ae6d7481f61c8d0a0ae8 SHA-256: e8927be6503362c01157c5438602e8624e8910850790d85eaeeb3e8f4e95e407
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://alacarte-husum.de/userfiles/file/luwenatidumalebuvin.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/dufowoxitev.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/b2gabdu5u8bf4ugpaiekoijm2l/liboluxewubuzu.pdf
    • http://resetimpianti.it/reset/public/file/64037767352.pdf
    • http://addisonplaza.abwingsmd.com/uploads/files/dakogutefaxiraxefe.pdf
    • https://capitalsyndic.com/userfiles/file/zamozajetibuvuta.pdf
    • https://zweefvlieg.net/userfiles/file/98629726756.pdf
    • https://tramhuonghanoi.vn/upload/files/nedafasodunikuta.pdf
    • https://chmelo.hu/sites/default/files/file/54052808747.pdf
    • http://teresachild.com/upload/files/85863212256.pdf
    • http://ikra-ekb.ru/files/fckeditor/file/wopojaxopazunutu.pdf
    • http://czernavendeghaz.hu/admin1/file/43191325572.pdf
    • https://magicdiscoradio.com/userfiles/file/28292983795.pdf
    • https://www.tristar-technology.com/ckfinder/userfiles/files/39539780764.pdf
    • http://huarui-bio.com/upload/files/jojesulofab.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161356d504f52b---rexojerutuvozisaxifebaj.pdf
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/norevoxuzuvofuwisigaw.pdf
    • http://harchovyk.com/userfiles/file/43618870230.pdf
    • https://indicaperu.com/userfiles/file/bewemamufanigebived.pdf
    • https://suprizpin.com/calisma2/files/uploads/vupigibuzajan.pdf
    • https://ww150001.linebot.net/upfile/files/20210909032507.pdf
    • https://oldd.adventurenetbg.com/userfiles/file/46820769157.pdf
    • http://jkbprivateiti.com/userfiles/file/pedupan.pdf
    • http://okna-stv.ru/userfiles/files/bizome.pdf
    • https://clubkdo.fr/img/pics/files/rezenomawe.pdf
    • http://transdeliveris.lt/userfiles/file/98932484019.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+iron+loft
    • 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_off0000d220.bin
a24b1ea2149d96771546010db27e60b7f0c930cf7859cbf8692f79463d596f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD220 9944 bytes
font_01_sfnt_off0000e805.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE805 16792 bytes
font_02_sfnt_off00010017.bin
8a2e0d32f3e9b4a98180e0caf758b62ba8110acc64af73cc5e00e6d068d6f998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 17616 bytes

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