Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f03ed307708be0d…

MALICIOUS

PDF

61.8 KB Created: 2021-02-13 03:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d8d5e4a3653658c228321a33c78cdc47 SHA-1: 246afaa3149d27f82795dcfbfc9c6ffbc552f9fa SHA-256: 7f03ed307708be0d3082335235ab99ffc5dd896ea03cde5f2ba2965307916d54
182 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that point to known malicious redirectors and disposable hosting, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF with high confidence. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9494

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=flying%20pickets%20only%20you%20sheet%20music In PDF document text
    • https://cdn.sqhk.co/jizesusaxeta/idSFier/10756593427.pdfIn PDF document text
    • http://detonic-deutschland.website/bulikonojenewogaret3gjfg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5fec96f97ca02.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/dhhhhnM/buwatotulemexafut.pdfIn PDF document text
    • http://strita.space/bizowiw9r5q.pdfIn PDF document text
    • http://parkingtest.xyz/5505380203lkd19.pdfIn PDF document text
    • http://vash-fasad.live/520528191288usz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_6011b6c8a4d98.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/cJwcltR/wuboxep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459922/normal_6021c1565c9bd.pdfIn PDF document text
    • http://giveaway2020.info/nimenuweminuxupawujexubeb1hy.pdfIn PDF document text
    • http://itali-big.space/michelangelo_art_bookeobcb.pdfIn PDF document text
    • http://50offstore.info/59957298284u9pud.pdfIn PDF document text
    • http://razvivatel.blog/8170234292thpdv.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/jgibOje/snapchat_logo_neon_purple.pdfIn PDF document text
    • http://proflist-barnaul.ru/nipetudadavidikezosif7pi0e.pdfIn PDF document text
    • http://ita-women.space/sapulimoveu13jm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_600b71a52947d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/coliforms_in_well_water_nova_scotia.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/zikokudiwuwagima.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/chaparral_pro_regular_font_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 5044 bytes
SHA-256: b6e2718562a5425e0261ee3b33a4dd6313feac3b550ee21f607b19432d71ed56

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