Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf015f60ff38dc6…

MALICIOUS

PDF

68.2 KB Created: 2021-09-24 13:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a141d2801500e43223fd19bb6eb5003d SHA-1: c3a4d5b5d160c0ada5945b0e89a1eb4ea494b1e0 SHA-256: dbf015f60ff38dc632ca4fc5f6521d8806ae3d0e76553211f529eb07a7f1e351
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one heuristic identified it as a link farm. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://bharatdarshan.net/rgroup/ckfinder/userfiles/files/nokemisujikozitagepa.pdf In PDF document text
    • http://bogaarchitetti.it/userfiles/files/dukubakadivebosapati.pdfIn PDF document text
    • http://knipia.com/userfiles/file/dovuwup.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/63329819299.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210922_222030.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b58e789165---60897671985.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99650046947.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/nejirupo.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/natekebasepesoxufobapanuz.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/12634718766.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/54039525476.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/woduribebedokisizasavi.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/82427700004.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/66476417495.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/mifazamibakusog.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/94120881118.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/43812049508.pdfIn PDF document text
    • http://rideco.hu/upload/file/ritugizipowinevegixapig.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/63334199899.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/74012467989.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/gaweminevodep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=world+of+cricket+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_off0000af5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 10424 bytes
SHA-256: 5b2a258516955de73a4c57b97e43112ff6ac07d08bd8efa37fb6ae9c45aa8808
font_02_sfnt_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 14512 bytes
SHA-256: 63e054d6d7d8c1d902988254db723e15a35a1165ba2a99c3a1716a1144e7ca30

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