Malicious PDF — malware analysis report

Static analysis result for SHA-256 695831812e9b47e3…

MALICIOUS

PDF

77.8 KB Created: 2021-09-04 07:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60b39c68f723945adb0c0a789794322a SHA-1: e60d4cc03a5c2bd8b9ad314920fee80a688fe21a SHA-256: 695831812e9b47e3d22c67dab8afd137065ad0434906910695fcc0a73236d613
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to compromised websites, suggesting an attempt to host malicious content or redirect users to phishing pages. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=nayab+mamlatdar+exam+paper+pdf PDF link annotation
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/bunonagawekafi.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/cc9eb10fa39dc09c93ed53bacd7dee68/75499652443.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/jupatanigajuw.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96a26362cd---renujizasotibudu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160709ac6edb25---lipolif.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/bcf383fa43b22defcd3767b77ff5e5a6/5930184847.pdfIn PDF document text
    • http://hoctoeic24h.com/upload/files/15867360556.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b61eb5037d---dawuvawanuvokez.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/sivamoxeropipagi.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079348647aff---topipomu.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/xetekuxazuzenogezazil.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/58163136901.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25b0c9096e---79670450457.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/vipolivefelixiwez.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5725b2318c9f3c337da6b8e9bda37430/94993587076.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607933df8ac38---vinesisunuteke.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/mureko.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/39142852777.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/59011876692.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/taxikosawejola.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/70405838164.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/kupalibofapefejirexibivug.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a19bde56492---2978594584.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_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 18004 bytes
SHA-256: feb828e93dbb4cd44aa44c11a66a3b8a2001363cac3336b566b013de8dcff680
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001123a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123A 10508 bytes
SHA-256: 3a139fe3a88ec2b7bfb499c0724992df7860fb6cf126286721e6ec410f0b551a

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