Malicious PDF — malware analysis report

Static analysis result for SHA-256 703a48c8191ac88b…

MALICIOUS

PDF

89.6 KB Created: 2021-09-08 18:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 80b0e93b28cc83ebc6a08c4862a2df4d SHA-1: 11f6ba41ba35bc0340911e1e1101c9ccbf5dd98a SHA-256: 703a48c8191ac88b9bca79754680de5cef8528653d641b8d8b11a1f809f097ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF contains numerous links to disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. No scripts were extracted, but the presence of embedded URLs and the link farm nature of the document strongly suggest a phishing or malware distribution attempt.

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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/31bc2b8e156033c79aa7faaed1cdf1d0/69083256871.pdf In PDF document text
    • http://fst-uinsu.net/userfiles/files/29130608421.pdfIn PDF document text
    • https://grnca.org/img/files/files/93954031130.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/89102325405.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210908_356B1B1BA8D6A5F0.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/54497788311.pdfIn PDF document text
    • https://temahr.hr/files/salorigize.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/65851222243.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7b5b92380---59763317803.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/27609000415.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/muxovukesipiviwalo.pdfIn PDF document text
    • http://vititanon.com/user_img/files/finakus.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/luxusawivinajawolubew.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/kewodenogofupajapas.pdfIn PDF document text
    • http://www.77ice.com/upload/files/4430377402.pdfIn PDF document text
    • http://hejia-ele.net/upload/sibegixo.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/14703734390.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/jitunosalijameza.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/pexuri.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/wejibuzerogogogalup.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/fosimovidegulisavagade.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/xiwin.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/wizunime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=godox+v860ii+manual+nikonPDF 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_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 10808 bytes
SHA-256: ddc019c0c9bb28b23cc9fcbd505af18616ab2dd3612a5275321c4bc625ee6a38
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB7 22228 bytes
SHA-256: 0598faf1bfd58514b81699bbd41fb6fcb9e1ddb5f07f12c255c3d785a49301ad

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