Malicious PDF — malware analysis report

Static analysis result for SHA-256 17732db5f35612e9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-10 21:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9cdb8d040777dfa45969f4c6782adc8 SHA-1: 8e86929925aed40a43c088b16049e051c22c927d SHA-256: 17732db5f35612e914bd5727dfc3fe457080264b829b3903112b05f0a187392f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded content, though heavily obfuscated, are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://niestachow.pl/data/aktualnosci_imgs/file/tawodaxegirepaxozemuke.pdf In PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/gugosuzofef.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/bivaruluvesixeg.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ae224ec4b489e3533a0c664f890dfebf/16131404263.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/905555412.pdfIn PDF document text
    • http://headrepublic.pl/images/files/vomiwewobiwokogoliwoz.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/leguduri.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/53826870536.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/tadojedakizi.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/14137066655.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/xuxiteb.pdfIn PDF document text
    • http://z500.si/files/kixuketepezakotobijote.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/dokutale.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/rejugakunekukowujudaxe.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/nokedafizavomami.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeefe1d340---53837667850.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/34250707668.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/77807251031.pdfIn PDF document text
    • http://birdwatching.sk/media/file/jasizonekefexo.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/22582404898.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/pukok.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/zepovozebesebize.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/75098261592.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/sabugipelep.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/4423655615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=modern+house+minecraft+apkPDF 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_off0000d7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 19700 bytes
SHA-256: 36a5c0c8b89ad57cafd4fdc0bfa08195863bcfeb0429bee836848de0fbce5509
font_02_sfnt_off000122e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E2 11024 bytes
SHA-256: 0cce86700067b3f0b9c9fc8fa0bfe362b41513b4ae610a6ab601d5ac5ed28d51

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