Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc520c2ed9def2c…

MALICIOUS

PDF

82.8 KB Created: 2021-09-13 01:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e3b4171026ba36ae20afa27ba66ae76e SHA-1: 4b195fde2223c239e765907ea789c1eb4f09e23c SHA-256: 0cc520c2ed9def2c6896cffe80ed3920aeb769dcb8893947bda7a2ceb60767fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The presence of a 'download minecraft pocket edition' UTM term suggests a lure to trick users into downloading malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://como.gattinonimondodivacanze.it/themes/userfiles/files/46286718342.pdf In PDF document text
    • http://btsoft.vn/uploads/files/nibugexadomitobuloropon.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210902100819.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/51931926288.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/vojewuzikusotow.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/88841734147.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/jekutatukuvosexis.pdfIn PDF document text
    • http://wwsm-us.com/files/file/nonafulojusefol.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/pesakafijodilupewekuga.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/38843062116.pdfIn PDF document text
    • http://polipack.ru/content/file/mogakekusipovufiwe.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/masexexozubar.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/jinif.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133a5be549d1---kosagudugesitepupowozaf.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/9965815949.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613379b9c2f94---xomunilu.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16132607cef38f---bemiwi.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/44367159726.pdfIn PDF document text
    • http://teknis.it/userfiles/files/wotela.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202194_182922_617.pdfIn PDF document text
    • http://ggbris.com/slbdavbatala/userfiles/file/17951380793.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/56395134027.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/tomavanuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+minecraft+pocket+edition+in+androidPDF 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_off0000d516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 21380 bytes
SHA-256: 62bb1e38acf20af9d4d44910594fd6790348acd256ea5bf29a290be35bfc70dc
font_01_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 10792 bytes
SHA-256: 4b1beedc708ffc3882ed7586e2b0bf44a7a7b3ec660c9cd8046854ab53608125

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