Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6295fea2f608d1…

MALICIOUS

PDF

74.4 KB Created: 2021-09-08 14:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d93398ccab4e10824ff33f2aba187eb9 SHA-1: ec78e812b926bf9d67700cd970ca630330e8f692 SHA-256: 5a6295fea2f608d17924ec90ae6501372958a08a8a58ad0eea9ebc483eb0f73d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users into downloading malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://childprotectionindia.com/lexcyberia/userfiles/files/88650782971.pdf
    • http://karimeh.com/public/userfiles/file/xilasadegofafovoradotob.pdf
    • http://goldmustang.com/files/files/17312386460.pdf
    • http://janjoling.com/public/ckfinder/userfiles/files/44083972950.pdf
    • http://hai-bi.com/uploads/files/202109041057199297.pdf
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/piponi.pdf
    • https://emartdeko.pl/galeria/file/27635258308.pdf
    • http://paneldeconsos.com/userfiles/file/bupujeli.pdf
    • http://96stone.ru/userfiles/file/zavasipenebudi.pdf
    • https://bio-obst-und-gemuese.de/userfiles/file/88728863699.pdf
    • https://democv.associasuite.com/imagenes/contenidos/files/34594229275.pdf
    • http://www.sudeshnamaulik.com/fckimages/file/49066249779.pdf
    • https://borgopitti.it/userfiles/file/47404704228.pdf
    • https://arabadvertise.com/userfiles/files/faged.pdf
    • https://gitedu.in/ckfinder/userfiles/files/96671612678.pdf
    • https://amt-alarmy.pl/userfiles/file/bepafarerukaver.pdf
    • http://bajcsidavidfoto.com/_user/file/22778223367.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fab9694cf6---mawugazororuwi.pdf
    • http://gerd-pollak.de/userfiles/file/38230724880.pdf
    • http://ciskmv.com/css/file/dawulupexezusagelamusav.pdf
    • http://tekizolasyon.com/ckfinder/userfiles/files/jerararemofirakupusi.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366c225a468---49372458018.pdf
    • http://acpiindia.com/userfiles/file/marilimebisuwunisiduluvaj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=crash+course+protestant+reformation+worksheet+answers
    • 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_off0000bea8.bin
23c55fe1f36f194d8eefde6aaccba686e13b264ffc55f2abc4953db9d0b790be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA8 16700 bytes
font_01_sfnt_off0000e9a8.bin
835f53374f24334573a63d637beb37ed47e24f0755c02bcf1da6d903d1cf5da4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 11008 bytes
font_02_sfnt_off0001032c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 16792 bytes

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