Malicious PDF — malware analysis report

Static analysis result for SHA-256 7021267afee01d7a…

MALICIOUS

PDF

78.3 KB Created: 2021-09-24 04:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d188c44e09ab538b4926bc7dc7cf8a0f SHA-1: 98eeee9f6ce2010e43d1648f0f3b555bd2e50fdc SHA-256: 7021267afee01d7a16366aecc02adcf643d5b32f3c7b263f8eb5586af1196a5b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially malicious websites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://ajwatravel.com/wheelmarine/userfiles/file/5246959473.pdf
    • http://ptichile.cl/userfiles/file/sazodalugitevi.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/97585313115.pdf
    • https://www.adom.biz.pl/ckfinder/userfiles/files/gufosuxawake.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/cg6f0vv58d5dlpo6965nr66afn/26485998392.pdf
    • http://peetersinstallatietechniek.nl/upload/files/38545770048.pdf
    • http://houselandia.ru/files/fazawuna.pdf
    • http://xmzhj.com/UserFiles/file/5892726218.pdf
    • http://bebsulmare.com/userfiles/files/minunuxawidof.pdf
    • http://www.sas.edu.mn/ckfinder/userfiles/files/perituganemu.pdf
    • http://lso-msm.fr/userfiles/file/17647638730.pdf
    • http://thamcohoaian.com/webroot/img/files/84061989125.pdf
    • http://1-champagne.com/blog_images/blog_/file/39600900768.pdf
    • https://dalycity.com/wysiwygfiles/file/vitadamatamuwativubazope.pdf
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/nefowivonakotijovezo.pdf
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/bexojol.pdf
    • http://energy-labels.nl/userfiles/file/xosofixipajubafagibipute.pdf
    • https://tonymusic.se/UserFiles/files/30020960062.pdf
    • http://roland-toys.eu/userfiles/file/26637142996.pdf
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/wugatevivoxobina.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614b50f59a1ab---6088823766.pdf
    • http://ejmk.com/ej/upload/files/8846685917.pdf
    • http://hcstonetw.com/uploads/files/202109081703225448.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=mi+fit+android
    • 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_off0000cec0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC0 16792 bytes
font_01_sfnt_off0000e6d6.bin
5db7cd4c9654eaa805509dec2ef4b1bb83d34699febb46526a3d1f1373c17881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 9992 bytes
font_02_sfnt_off0000fd0a.bin
13906abf1a8baee0b2d942aa36178dbc1cf9c1075ff253759904d363dfd39392		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 18064 bytes

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