Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ae29f51225bb7b…

MALICIOUS

PDF

87.7 KB Created: 2021-07-25 13:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a8f7447e7e08ce72c3b1fdab9fb9127d SHA-1: da44d09af240fde798a9a5195fc644ba11d20192 SHA-256: a1ae29f51225bb7ba8c511893615979c5025fe844d9446c62ffb513daf43785b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, while numerous, do not directly indicate a specific attack pattern beyond leading to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1ddef82a---60580740599.pdf In PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/bp3bfj6d75puad2nobcblia0jh/vonigafidefapidujovuz.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/b3b8c8b0d26b63487bc7d3b115d45e8b/momerekonurosujojuze.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/wurixasarinudapipogiguj.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160834934606bb---tesozadubulabom.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/repomower.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/vufawa.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be1fe0c4128---54975687430.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/23128613906.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1d42602b05a3ff9695667d3f1842af87/mibela.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a0f75fee---zugado.pdfIn PDF document text
    • http://mobitransjogja.com/files/56675863997.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/15735565817.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/zavedopu.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/cef45d963feb9af2710dc177278cad2a/norajevipojozodabilusox.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/pugirafovorosidek.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/2lk4hehmtaa2a97ldruqcith6d/36344082567.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/cb3382f3e8dc8a432260056cea329a69/60595673006.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160785d2ca5079---15974461769.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e073b2691d8---xoxidekepakizi.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/36869792240.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083cca5ceead---98078974924.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/12858570138.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/senevujibosarekesujofutir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=can+you+have+coconut+milk+on+21+day+fixPDF 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_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 18248 bytes
SHA-256: f69e47223a9c43bb19c7b652c86af3f47db564c9b97c8e1ca90dbb40c141eb26
font_01_sfnt_off00011f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F32 11152 bytes
SHA-256: a7e373c11e5d13142122c0bb184a481088ba1b6422e6e0accb37ad23ea995668
font_02_sfnt_off0001392a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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