Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2e355c667bdf3c…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 17:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6577e585329eea48e4605ed79c287f65 SHA-1: 6437c3cf380b7e900d4c014566dee0eb16f1cc9b SHA-256: ed2e355c667bdf3c13b9d1d69069b6e2cb069abaafebcebccca0ce2a3ef8c79d
164 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous links to other PDF files hosted on compromised websites, likely to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces its role in a distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/gs661e8k1obk30sub7cpgau1ai/rovotezutitoziber.pdf In PDF document text
    • https://csodamalom.hu/files/files/48184388664.pdfIn PDF document text
    • http://www.heksan.com.pl/file/fewedilobavipupap.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/rinovuw.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/puvopujudegigoke.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/wajut.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c78a3f6f717---30071769353.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/f768339a364a76923c1e77dff0aa08b9/35866395917.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c1ed5c650877588c43307946a7456e2d/6582911024.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6078e056bf235cba5add7761c7108376/bizedixovanepafiz.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/7637dcd326e3a2902ae1d8245f46c66c/xapasonanajof.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/9705e1e31af0a95fa3927d7942a51215/wabejabemanosak.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m6jbh6ur48uu2d341uqj8af5o6/97208810160.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6d7215e10dfce0cf3f19513dd2a70082/49976115204.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/b45e9a6712fa422a535fc7667f4c1e14/tegajivav.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/85570154690.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/14845197558.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/97538733028.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/pitaduvesi.pdfIn PDF document text
    • http://weingut-suppan.at/files/4408296336.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/650e0aaf481cd9fa9374a56e0e36e464/35763454609.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/tmi2aga58778ntgibkkccc7ila/84712470723.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/zutebozojiduloz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+install+cinema+hd+on+androidPDF link annotation
    • 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_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 10712 bytes
SHA-256: ebe9395523d4180d907cac0a57e26e4ceecf078a7ca60d884cceaf384a914f79
font_02_sfnt_off000122e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 21024 bytes
SHA-256: 8ce5d92c33d6f7148456f3efd2ea10741532def19b082d9d1b335f81fa93769c

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