Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7aa9349770687db…

MALICIOUS

PDF

89.9 KB Created: 2021-03-22 19:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1adfd8b6c09d0313890489a734bd838 SHA-1: b6f28793102545d46469ecdf0626eb1b8df540c5 SHA-256: d7aa9349770687db82785f8e30124fea2bcfe60e796876238dab46d11a4759e8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm for SEO purposes. The primary URL, 'https://ponafet.ru/strik?utm_term=kill+or+get+killed+applegate+pdf', suggests a malicious intent, likely to redirect users to phishing sites or download further malware. The ML classifier and ClamAV detection strongly indicate malicious content within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=kill+or+get+killed+applegate+pdf
    • https://cdn.sqhk.co/kizofapekeku/nIheTii/mefobigivawadosadulabiruk.pdf
    • https://cdn.sqhk.co/fuxivuxovu/3jdlgfA/dufegojufiwofexojemeb.pdf
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/biluwi.pdf
    • https://cdn.sqhk.co/tunaluvum/iP9hhge/sevulera.pdf
    • https://cdn.sqhk.co/foropogajag/kidv7ZS/zokisotubomizo.pdf
    • http://xbet1.fun/lejerozokarz3qsj.pdf
    • https://gilemana.weebly.com/uploads/1/3/5/3/135319463/navulifuwufix-ridum.pdf
    • https://cdn.sqhk.co/lululitoj/fxghjKe/vintage_encyclopedia_set_value.pdf
    • https://cdn.sqhk.co/tezakagadol/jbGht6n/play_4_night_florida.pdf
    • http://wegijezunulej.22web.org/tozapagebufewuguk.pdf
    • https://cdn.sqhk.co/segenapiza/ayfjf7N/63651797684.pdf
    • https://cdn.sqhk.co/saseponirifa/TZCHHSr/police_siren_noise_uk_times.pdf
    • http://shop-you.xyz/73694510343ikjdv.pdf
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/wepawi.pdf
    • https://cdn.sqhk.co/tefozakozup/xzOid4t/world_soccer_stars.pdf
    • http://sethel.xyz/jitefudupazefudofwd3y0.pdf
    • https://cdn.sqhk.co/fujigugi/76Gibjb/infection_control_nurse_job_duties.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lorugipopuxe/filezilla_server_2003.pdf
    • http://bemerufupatovi.rf.gd/browser_terbaik_android_2019.pdf
    • http://rovuwuruw.epizy.com/arcadis_stock_performance.pdf
    • https://s3.amazonaws.com/tugabijenovili/pinixuzitomotiwene.pdf
    • https://s3.amazonaws.com/paxunu/85377981045.pdf
    • https://s3.amazonaws.com/jebupofedijakuk/a._d._a._m._interactive_anatomy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001144e.bin
72fc1d2401f5d5d3b161a116e9b13f723c5045372de10df2aa8b6a3f7cebfc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1144E 4744 bytes
font_01_sfnt_off00012480.bin
a5ec1ef5b422c58de7a9053acb0392959a748d28d3c68944226bccac20cdeac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 11592 bytes
font_02_sfnt_off00014be0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE0 4324 bytes

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