Malicious PDF — malware analysis report

Static analysis result for SHA-256 80dada2350b295cf…

MALICIOUS

PDF

70.8 KB Created: 2021-09-30 20:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 154d2ff7fa3095f658aecebb0d78f895 SHA-1: b7387c5348096671ac132695c319749f97444ff9 SHA-256: 80dada2350b295cf3c648ab46bae4f3e3ea145bcafa7c4f525557d510c1aa0c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs that form a link farm, directing users towards potentially harmful content, specifically APK downloads. The structure suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://ourcampuswindow.com/ckfinder/userfiles/files/16407638744.pdf In PDF document text
    • https://kvizek.excore.hu/ckfinder/userfiles/files/92937067295.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/zekebelotikazuwolaka.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-18/20210918083108660353.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/rebusitufisexubuwavumi.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/jojuzofu.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/ruvivepufarewumuj.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/nawusitaso.pdfIn PDF document text
    • https://termoformat.md/img/files/49237332580.pdfIn PDF document text
    • https://verner.lt/images/files/15879814171.pdfIn PDF document text
    • http://kahasat.cz/data/file/xerarovolaruk.pdfIn PDF document text
    • http://glassick.com/userfiles/file/zemelusoditam.pdfIn PDF document text
    • https://langumeistras.lt/i/File/jagaginit.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/31758366153.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/40857683524.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/49795907088.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9b17680aa---laturevesexakaxate.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/bevamimikopipugozakamuma.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2sabovi8tbqdas5v6vsrsjb0k7/wovagupilijuzedoxeso.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/36749215671.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/8497382809.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/57252035415.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/30961582039.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/fodovofalarabagujodujam.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/8029258779.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/85134622836.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/jijorubimadalemaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=coc+reality+apk+downloadPDF 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_off0000b4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0D 15368 bytes
SHA-256: 77017998f41d1e71f6c8e62fcdc13cd9d311fec739ee43012a57c5be8dbf4c92
font_02_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10660 bytes
SHA-256: 4f62bc9ba37acae7094e1887085e445415cea319456f9feec160949973c1c5ef