Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c27f2f340b9b7d…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 02:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e6a8f48f825d4315d28339edbc82055d SHA-1: dce8ac6b67368de92f84ee3076b675df1b5d7989 SHA-256: f5c27f2f340b9b7d90a55e320b11bab1b9e1e5c85aa0baf5f8da9c3cd203c5ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://infrive.ru/uplcv?utm_term=arihant+chapterwise+physics+class+12+pdf+download+2021 PDF link annotation
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/iul7naojmeugo5f12126b8ep8b/91823844776.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609137a567efb---xogez.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d8c94a4340478fb274b6a244b92ce8ab/47220992222.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/9r7ok869o8n33vih33hf88k4ph/foxinututesozenekaruvut.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/konomepefikupet.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16080501a5a767---75874535055.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1624083490.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/tejepevaxarife.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/39527255451.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1628523041wijovotupij.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/13767509088.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16100ccb6862db---62360470618.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/wofan.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf9ddc41e0---51764836957.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/i1fnvptgimpt555stl09j6b4dj/49950543390.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/79709868963.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/d52dee61bddcc19fcfcae4f110f19dd6/xiruripodegibidosoneteso.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/kizibovemabenekexu.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/lorexolilevozis.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606fec3aaabf3---zuxusipapoziw.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/13274929299.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210719_5293AF93E97A1A9A.pdfIn PDF document text
    • http://yuha.be/_files/file/raxerazivebibameju.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_off0000dbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 18736 bytes
SHA-256: 82b5f5d0ad4b88120ae8fb3fedb4d4ca44af81c8eadedc003640cc3228a2e62a
font_02_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 11192 bytes
SHA-256: eb5d3fd1b217f98cd244148dc4332a0273d80b19c6b25a7af3da7bc1e21ce144

Open this report in the interactive analyzer, or submit your own file for analysis.