Malicious PDF — malware analysis report

Static analysis result for SHA-256 384f63dc99d3d9a5…

MALICIOUS

PDF

99.0 KB Created: 2021-09-18 22:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0b7706711ee2e54a1569c4b9c9034409 SHA-1: 21fa367831a35952f5f0f3fb8126b3d97e92358c SHA-256: 384f63dc99d3d9a55c1f4aa9ace90a9e22879db42a46c4716c4bc1d6c89380bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://queure.ru/uplcv?utm_term=waking+life+full+movie+online PDF link annotation
    • http://grubstreet.ca/ckfinder/userfiles/files/zebikagekat.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/14012533182.pdfIn PDF document text
    • http://sissonne.hu/editor_up/fexuwoterokop.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452cd8ecc26---tododosawulep.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/naladilowil.pdfIn PDF document text
    • http://www.bandungmesin.com/file/tifovijifiremajimomirutan.pdfIn PDF document text
    • https://vzglavniki.net/data/file/wopez.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/vozafexefisirufin.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/98763606927.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/18594885546.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/37529921730.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/27328504647.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/regujugizifodopelaguwa.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/lisobulotilogomazipag.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/9303638012.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/17169670280.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/10658630035.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/metituwof.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/97078211779.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/68209810727.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/mipixuvezed.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/3773832040.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2597ffe8fa0a6216d0651a9086c02d01/61166330379.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/41295024383.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/livuvivuxororibi.pdfIn PDF document text
    • 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_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 10440 bytes
SHA-256: 2958334dcf8de96ab565f740ba847fb0f87879879fb7f291421ebcfb32af374f
font_01_sfnt_off0001383c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001504e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504E 17588 bytes
SHA-256: 4ce496967b917f669260a27bd34cf2a3451fb8c3e61f49fc657c56f1d2489999

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