Malicious PDF — malware analysis report

Static analysis result for SHA-256 802a696e0b9b5635…

MALICIOUS

PDF

81.3 KB Created: 2021-09-21 23:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7253ec84d75f2f0cf03139bf06e634e4 SHA-1: c5e4903318c7e0a12ebc7280eb5bcadb469442e7 SHA-256: 802a696e0b9b56355387f1d2c1ecb0d44c75ecccbeb29e55c6145eb5de428418
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=in+a+wild+moment+1977+full+movie+online PDF link annotation
    • http://diadiemvui.com/upload/files/girusogusegovug.pdfIn PDF document text
    • https://jobtiara.com/files/files/rovut.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371b0413040---jefetekuruwi.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/noretozunalejakuvum.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/84530360264.pdfIn PDF document text
    • https://ismart99.net/upload/files/tunifevalumonesogopis.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/nugib.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/28296146126.pdfIn PDF document text
    • http://ketex.com/trcgp/ckfinder/userfiles/files/jelatoxuzevub.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/paputudavufejumifem.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/parupalerikoniw.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/91695409821.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/90579484315.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210913095709_327616508.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/ruzagojeriwilolivor.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/82383479662.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/reramexufukanubufefin.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/pijupawepujanexu.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/13202727155.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/lepezimosokin.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/2463154068.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s9etnhg7gh7s71i6oje8mcahm2/kavunabokirifarifonisad.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/susurebalexinugag.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/kawidinukel.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_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 10720 bytes
SHA-256: 34d329b5758e9f5c2a67f057780b9dc7a3206ee21a8d73515353c0cef465ba3f
font_02_sfnt_off00010b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B25 17300 bytes
SHA-256: e057d07509168a45a0d70856ae170019e236f76bf2830a7f0cfec635eabe2d7e

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