Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56ced6177ae7a5e…

MALICIOUS

PDF

68.2 KB Created: 2021-09-22 23:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 41c5254ac177c6200a5dd5b09b4e229e SHA-1: 35fd7c60e416367c38857387bed74dd1f25cb070 SHA-256: f56ced6177ae7a5e7d8b27cdd869c07d6251555b0a46c28487df970d2e20ba71
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on suspicious domains and flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://paramourpourbebe.bettygagne.ca/userfiles/file/94829396592.pdf In PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/37846447212.pdfIn PDF document text
    • https://istanajp2.com/contents/files/64714604128.pdfIn PDF document text
    • http://seattledesis.com/fckeditor/file/kavuxegeresedagimuzen.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/21405814234.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/jokuxonelevalasepuzegax.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/1299734678.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/luzabiduvuwi.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/18407635422.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/78157262175.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/soduruvusadurotomet.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/kuxibuwibiketelozo.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/30551025689.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/boreleruwarixoga.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/23109766589.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/japoridaberobidej.pdfIn PDF document text
    • http://salwex.hu/file/55611072824.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/muwokatuwimegumero.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/663ba7f037ef04afbd4bb1e362df0249/besuxexalaweduxe.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/zepuveru.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/wabekosarulovixebevuwonuf.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/77093195270.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/5815360416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=words+that+start+with+o+and+their+definitionsPDF 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_off0000adfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC613 10484 bytes
SHA-256: d85e11efd3121bd06f465667aff95ca4434a44d45eb6164b7dc0ba9bd18c0f7d
font_02_sfnt_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 14912 bytes
SHA-256: 16905c62c7ce319e1ba78342ca01d7dae1280f7b923a22274a31fc6f438a6df9