Malicious PDF — malware analysis report

Static analysis result for SHA-256 df68197a0311bc67…

MALICIOUS

PDF

866.2 KB Created: 2021-08-22 07:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 6e8e7f22671593c0899f148e86f3222c SHA-1: 8f292fa0c2ac8a89227128d3eb06318d7bfe2224 SHA-256: df68197a0311bc67098720d349baa52c6e8782a787fc692ba0659ef4db033de9
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains embedded JavaScript and multiple external URLs, many hosted on compromised WordPress sites, indicating a phishing or credential harvesting attempt. The heuristics strongly suggest a lure to install a browser extension and harvest MFA codes or one-time passwords, consistent with credential theft. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4901

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nomylo.ru/uplcv?utm_term=lacrosse+atomic+clock+manual+bbb+87733 PDF link annotation
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b68b9e5652---79833789494.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/tvf7glr7eh184115euclbq9070/domafeb.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0dca38527b593185f629f5e3712128ea/taluvezatupiwuzemakipe.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bctjeg9ue7hqtasdq93kv0afv0/61593146499.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c9403002a73---24449703077.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dujanekazuxaxewikuzu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b740fb466ba---salolutito.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/602c94e410585ed06085a7c7af70fd5f/4748405503.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f8033526374b03128ebdf01aeaaaf7dc/10700607336.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/wifabumubesimijanawiku.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/zafafoponofigonuremoze.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/92896853984.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/demujuxibubogosek.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/kigizuzojax.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/6vdui24734uu4im6iinjed5kk0/vulogulonijowan.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16103b366067bd---pigerusinegefe.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161143ea08084c---21450387390.pdfIn PDF document text
    • http://18554080.com/userfiles/file/rosuben.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/zegenegedatemef.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/q9o9kijcg0l02fnmdcvcfec9fb/pagejezujilopidukonale.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/teliposozemuxu.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/44487568566.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000d1fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FD0 14652 bytes
SHA-256: 95f4d5c10f8a1c222ddd21f890745eb94d62923f491913a0b92b28b147f4a094
font_01_sfnt_off000d44da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44DA 11112 bytes
SHA-256: becaa94bce8a68be810b1df2ab173dcea9a0e2facf74e21335ced569e77b14a1
font_02_sfnt_off000d5edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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