Malicious PDF — malware analysis report

Static analysis result for SHA-256 566f2d47ccff061c…

MALICIOUS

PDF

71.6 KB Created: 2021-09-17 13:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 53702153f42d21cdfb8ed2574471b927 SHA-1: 03bc4493e8f5b6e724d96f007db1e2ab31427996 SHA-256: 566f2d47ccff061c1d73aad18060fd2612e9a4fddd5f1cfa5963b32a14d67653
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified 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 suspicious domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.gurkhasfinance.com.np/ckfinder/userfiles/files/zinivixafipamufawiramunev.pdf In PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/tipuzikisod.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/dopazinewiparimunemiluxa.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/72885252087.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/zafifuzamisab.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/85635783477.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/komuzubigus.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/35321704853.pdfIn PDF document text
    • https://km2804.com/ckupload/files/gunaroxopojuwimeg.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/51939690828.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/94780524905.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/86767519718.pdfIn PDF document text
    • https://websitesiam.net/UserFiles/File/72524383858.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/39456754914.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/57709574982.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/komiwolakotezojuv.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/56211686945.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/dijezi.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/dagepeju.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/vibixato.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/melete.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/xiwotenaruxojin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=gta+sa+muscle+cheatPDF 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_off0000b704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB704 10220 bytes
SHA-256: 0ebd133253a9e1a5ff128735300b54426d0e6218c8a5764e747ae49b9767ae47
font_01_sfnt_off0000cdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFE 16684 bytes
SHA-256: cc397c3b458a77418e4a2ee08efa28184d2270a2d042ba2c6179031b30b72481
font_02_sfnt_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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