Malicious PDF — malware analysis report

Static analysis result for SHA-256 b569b7b46dff3420…

MALICIOUS

PDF

89.3 KB Created: 2021-10-17 22:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 170f905f4ab6c98fd4ba4a81f4612b50 SHA-1: c64588bc0c034cdba7a2e8d94d1da7ce473da5ba SHA-256: b569b7b46dff34201b3b423111d4334afd21c16ee151b17d2ad7c1510b3a3974
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within PDF documents. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick the user into performing an action, likely related to payment or an invoice. The presence of multiple external URIs, including one hosted on 'csc-028.com', suggests the document is part of a phishing campaign aiming to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://csc-028.com/userfiles/file/20211007160912_0mgwe9.pdf
    • http://importfoodfair.com/userfiles/image/2021/09/file/xorudejipegejexu.pdf
    • http://liluby.com/upload/file/punewanonegipukodet.pdf
    • http://kredoteka.ru/uploads/file/sobelizotepexezipuja.pdf
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/82910000742.pdf
    • http://makesrealsense.com/ckfinder/userfiles/files/58522045974.pdf
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/85197086834.pdf
    • http://alde-pace.org/ckfinder/userfiles/files/6774960634.pdf
    • https://hiroyoung.com/data/files/lofulum.pdf
    • http://filipdegreef.be/uploads/files/35640867991.pdf
    • http://corising.info/sa_upload/userfiles/file/20210914182907.pdf
    • https://silverbirdmarketing.com/pages/images/file/xuriwupetunapinosisuxa.pdf
    • http://agedwedfjtj.pretty-match.com/upload/files/tovozubodi.pdf
    • https://cevhertemizlik.com/userfiles/files/82824343491.pdf
    • https://dianthusindustrial.com/resimler/files/79663828231.pdf
    • http://lgassociates.in/uploads/31999554407.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16159cc0dd20fa---74329335709.pdf
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210911064240.pdf
    • http://finalstage.biz/js/upload/files/sikekesu.pdf
    • https://muachungbaohiem.com/uploads/userfiles/file/lowoxigovekatarifu.pdf
    • http://officinedesign.it/userfiles/files/6434964410.pdf
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/redusitakeferufadaf.pdf
    • http://studiogiovannone.com/userfiles/files/komejakipesusag.pdf
    • http://bamor.org/userfiles/file/89882976417.pdf
    • http://feedproxy.google.com/~r/Xvkpad/~3/TxADE9PCSUw/uplcv?utm_term=video+production+contract+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_off0000f6be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 16792 bytes
font_01_sfnt_off00010ed5.bin
a03dd2e87f9b84f41e19cce707b734e171d2a88bced4df706db2e303be95d85c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED5 10468 bytes
font_02_sfnt_off000126b6.bin
d9492b1ebf518082ebb11c47f88f0f76709030d3dea5a0b1ffbf40ad7d8d7f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126B6 18896 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.