Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b47e25cc86474a…

MALICIOUS

PDF

76.0 KB Created: 2021-09-01 01:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5607d39b270a6d23edbeb2379683fcf7 SHA-1: 83c8b8e46cf2c170030a4a9243bf7a31497cecef SHA-256: e0b47e25cc86474ae29f4e71b0e4b85ca7180daeb4409d2a16972b6a0238466e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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=were+too+young PDF link annotation
    • http://rnralpha.cz/res/file/bemadup.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/3695010664.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/zetotavuzefag.pdfIn PDF document text
    • http://congtyvima.com/images/Download/jisakomajupu.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/67732732768.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/setinupa.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/lhino26dviqdadq19ktt7kcqbq/pijisemazaz.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/65993880217.pdfIn PDF document text
    • https://festacontinua.it/public/file/bipurexokosidoza.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/dawewebagenirefikejonige.pdfIn PDF document text
    • http://arablift.net/userfiles/file/35106777962.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608f21423532a---25660862578.pdfIn PDF document text
    • http://abworder.com/uploads/files/97461445600.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/44164266799.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/75807067819.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/53957886821.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/gozifozegaw.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/39271791934.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/96914489018.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/zaleruzebolenufe.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/65907042382.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fd885002965---62170416534.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/fipebolirepo.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_off0000c503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 18196 bytes
SHA-256: c9c6e578dec0cf3cf2850e5db04db6f8cbdfab4afab32c80ec59e709fa52adb1
font_01_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 10020 bytes
SHA-256: f1cf80a27b22daa8b698006374166903ffcd1f46d5bf533f7b31c1a7a485b86d
font_02_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1