Malicious PDF — malware analysis report

Static analysis result for SHA-256 49563eefee939c14…

MALICIOUS

PDF

92.7 KB Created: 2021-09-04 12:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8cd595fd0c904a019b8773577b7072a9 SHA-1: ee1820d2e568df241cf09c93055a5576b6c019c7 SHA-256: 49563eefee939c141ac5249be2e41af01c837d81aa1c14dac48e6cd75c5fd3b8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The presence of numerous unknown URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/et8aen20247b04bqlifm5s0vlt/piritusedajo.pdf In PDF document text
    • https://uleiuri.ro/userfiles/file/3278458388.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/wisunomudazomuxusis.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3ed341c68d8f73dd35bd2fb97fd68760/vogugotilavawitez.pdfIn PDF document text
    • https://razredna-nastava.net/files/vafobano.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/benofe.pdfIn PDF document text
    • http://dakmet.pl/upload/31946008455.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/e9b29jf11ii9upa96ra0rvjr35/61899582237.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/puzoratexutakogego.pdfIn PDF document text
    • http://hongdacable.com/d/files/sasesegepekugiwe.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/d3008814c2059e4b30de087ab8d9e0c3/foxejasejob.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/pawetorolezunubem.pdfIn PDF document text
    • https://telenovella-bg.com/files/54589573554.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/744a342b9b3ddfd1550e91d267852dec/vigegesoxametitibefutuz.pdfIn PDF document text
    • http://lizhechem.com/upload/files/podigapemasenovizewifev.pdfIn PDF document text
    • http://1careglobal.com/upload/files/nilemus.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/28030272356.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e4b8db72b77673847301c020ecab353e/54595137123.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0a78d14fa---14916020620.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/mozenip.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/93575367928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=counterattack+falling+in+love+with+a+rival+novel+pdfPDF 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_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 11104 bytes
SHA-256: 23b06c792cc16fba98e2e1bfd7403f84499f63f99200933252f6d7b8a869ee35
font_01_sfnt_off00011fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B7 17512 bytes
SHA-256: f2ef30ac96260806b567df67426a080266ba88f6e4c21a962222a9ad73e41299