Malicious PDF — malware analysis report

Static analysis result for SHA-256 200beb351aff4d69…

MALICIOUS

PDF

85.2 KB Created: 2021-09-08 23:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ebb1f8dacd63685a2a275f0186612d6 SHA-1: b6aa6ad1cb81681141b6f885281948d39d8927ea SHA-256: 200beb351aff4d69d47293a0efaf606952846e45973d24c909cd271f2e022fe5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=temas+anime+para+android+go+launcher
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/88935669578.pdf
    • https://kawanmto.info/contents/files/lokipiz.pdf
    • https://bcbc3399.com/upload/files/zatigawixodinus.pdf
    • https://kingcarmotorista.net/uploads/files/vewanesatuvakuxudojo.pdf
    • https://champion-osk.pl/userfiles/file/61133192310.pdf
    • http://skolky.info/foto/images/file/85890051443.pdf
    • http://gabident.pl/local/userfiles/file/55284936580.pdf
    • https://protectname.xyz/whoisprivacy/userfiles/files/burinavamij.pdf
    • https://relaxbotanika.cz/ckfinder/userfiles/files/mukovi.pdf
    • https://goacetours.com/ckfinder/userfiles/files/dividisat.pdf
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/92336142270.pdf
    • http://k-sta.kr/FileData/ckfinder/files/20210906_CA7658F5FCFD4962.pdf
    • http://dpholding.ru/uploads/files/1257117264.pdf
    • https://indobaliart.com/sitefiles/file/45304417124.pdf
    • http://cnsgawefgl.netsociality.com/upload/files/ladotenu.pdf
    • http://lorichphoto.com/pictures/file/sazukelebitomu.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161307943740b7---46931811514.pdf
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/96172197304.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/41082643430.pdf
    • http://jedzenie365.pl/ckfinder/userfiles/files/97586175989.pdf
    • http://pbpharm.com/upload/files/88643619757.pdf
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/15841782137.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/wuwovawoxobefuvaxe.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f6b8d14b3---xaxigenutavokagiloxirijow.pdf
    • http://aloisiquadri.it/userfiles/files/sivegemamegewedineterukep.pdf
    • 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_off0000e0f3.bin
cfd05f4b360acff382c8bb7413000b53abc84978c6f950507ddf78a84841a65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 10928 bytes
font_01_sfnt_off0000f9c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 16792 bytes
font_02_sfnt_off000111d7.bin
10a7e580a594dcfbfbaa929534582a41e671fc47ec1cd2c74b0f14c1051c0bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 19596 bytes

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