Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c67bf59578cc3f…

MALICIOUS

PDF

103.2 KB Created: 2021-07-07 12:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bfc31a17e21cb7ed253f48263926e41 SHA-1: cd1dbe51418b2ee2cc4d697be3f04fdc08a9c80e SHA-256: e2c67bf59578cc3f853f03f20c56f4a961eb5511d9c85bd0ac72bc68146c4db1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links, with one pointing to a compromised WordPress upload directory, suggesting it's part of a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • 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://idea-web.ro/app/webroot/files/userfiles/files/pogatosevewelad.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24ed86827a---11592361791.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f301002404---nitawadogipapivurep.pdf
    • https://abe-rdc.com/userfiles/file/46381318027.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/8874251bd4460a35bc72876697be23ae/puxamidovupilobewalabi.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5fd52fd79---pituveb.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42e3263e28---71551838465.pdf
    • https://vetregistr.com/ckfinder/userfiles/files/gidusagepobilil.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/84414977e1c541bbb338364c4df0b0f5/bajuwo.pdf
    • https://vanphongphampmc.com/upload/files/bazujenezesalulapapox.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/81c0b19a15d24e1af6ad0950986c2f60/87694343735.pdf
    • https://rent-1.es/ckfinder/userfiles/files/dudozewokazononi.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b2a4135a6---61680199134.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160838e27c6015---89218197516.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/7ei6f3n9dd0upugi9fupldgg04/kubareloboxuximidosukafu.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d62df35aeac---39028032475.pdf
    • https://flyags.com/editorResources/file///40099583957.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3664826c0f56aadaf4fe3e5414a8dc75/28584923386.pdf
    • http://soft-pro.hr/upload/datoteke/lerepiwafijixilezofomovut.pdf
    • http://0-50.ru/userfiles/file/66432355337.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/9ed4005ee30395c44f09edca658f3c8c/nepisomumatokeku.pdf
    • http://ildongwire.com/userfiles/file/5483179150.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb74680e3d---80998512170.pdf
    • http://bhk-aindling.com/userfiles/files/58371440546.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb0baa5755---14818175894.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=new+episodes+of+game+of+thrones
    • 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_off00012d5a.bin
a87c92d18a4eec935dfb4f5ee97a60c25ed9323718e2d61dbbecffb6ac60f21a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5A 10964 bytes
font_01_sfnt_off0001467c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1467C 16792 bytes
font_02_sfnt_off00015e8e.bin
bb6c3cb1b6f911dd467e68b597603533429f48924cf303936a758cd17e69349a
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8E 18152 bytes