Malicious PDF — malware analysis report

Static analysis result for SHA-256 6920f1391f204b62…

MALICIOUS

PDF

69.9 KB Created: 2021-10-04 07:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f0625b30977ecac77a0ff7ad84e4730e SHA-1: 8b889de591d7ed4fb3e10e9d77b54bcee8975d86 SHA-256: 6920f1391f204b62a5155aef101ce00f5163f8a1be5a932d383fcffa26b17924
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://enewind.com/pliki/file/sopopulojenofunanulaba.pdf In PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/50768959937.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/worususo.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/fifilepiseziniduvuluto.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/24948497703.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210908_0AAAAD6983A869C3.pdfIn PDF document text
    • https://kvzriu.org/images/file/kusumukobosa.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/mowuxetife.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eca782c580---82959285209.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/ruwomumasinobale.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/9574570092.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161518e7a0661b---25844900989.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/61408676464.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/12304479246.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/76023805152.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/60494870689.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/85266431506.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/3344239768.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/meraminaxaxoju.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/wonul.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/76991912678.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/88799132193.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/bomozuxamafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=passed+away+messagePDF 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_off0000b12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12E 16488 bytes
SHA-256: 5fd3732c1414d95b742a0b35f7c7293a17daf75122b2985a324b2bd3af6a4d0b
font_01_sfnt_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 10232 bytes
SHA-256: 89158f4ad210ae0f244908ed4c7972230069938bf0f638356168398055680884