Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1c6cab24c834c6…

MALICIOUS

PDF

80.3 KB Created: 2021-09-12 22:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d085d40051ee18f6c247b739d901ee0e SHA-1: 94a95233820bbabc7f4e44cdfa0ab51150ce6236 SHA-256: 1e1c6cab24c834c6aaf1dcfad6aa29c9f8d16dff83e5fa8a321fb10f9086af7a
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. The PDF contains numerous embedded URLs, many of which point to potentially malicious or suspicious domains, suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to host a large number of links, likely for SEO manipulation or to spread malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://hgindustrial.eu/userfiles/files/jesapomapiboxawa.pdf In PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090417581_428768071.pdfIn PDF document text
    • http://scarpatti.com/files/xojidosumutezolox.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613193bf5e810---fofuminoziketud.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/mezijezoxosefadebejuwer.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/sikituzoxegi.pdfIn PDF document text
    • http://esejsc.com/upload/files/89085727264.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/tenamonarolivivax.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/93492617579.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/lenimatokiwegirasamoji.pdfIn PDF document text
    • http://artediapharma.com/upload/files/11994223076.pdfIn PDF document text
    • https://edex.co/userfiles/files/tutunagugojazisisiz.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/mukeritotumanomof.pdfIn PDF document text
    • http://balone.net/_upload/file///52569930000.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/nazepamokokomak.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/niwufalalewonepa.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/18776212236.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/luraboxawaguge.pdfIn PDF document text
    • https://worldtradezone.com/userfiles/file/15725951428.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/37044746841.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/32047732945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=3d+parallax+background+premium+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_off0000d460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 11100 bytes
SHA-256: 0ef7cad91b457d474a502afc06a4045805882420a3932e50471c5e381884b23c
font_02_sfnt_off000105d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 18092 bytes
SHA-256: 9e0bdf7937d86b3ef03ff8dd296feba6b5b2dd75194361d1db0f0bf6bccefbe7

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