Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf810fae499c4e08…

MALICIOUS

PDF

67.5 KB Created: 2021-02-17 21:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6863edf9e9628e07936d5a363cbec2dd SHA-1: 326513ac6f12ac4dd7de060f58cebdc9f763afad SHA-256: bf810fae499c4e082cfecd88a4e2aa4a9d2ae88c2190d082bd73929c4a32a6db
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wix?keyword=kenwood+subwoofer+2000+watts In PDF document text
    • http://sollabs.xyz/what_are_some_examples_of_biotechnology_based_products2tus4.pdfIn PDF document text
    • http://doordash.fun/fegedutaxolavulijurexuxen8y496.pdfIn PDF document text
    • http://cmbespaceclient.xyz/35041580398dz9xc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425214/normal_5ff64f0c73aee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380675/normal_5fc6af96a840e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483388/normal_5fda776b1f358.pdfIn PDF document text
    • http://pumba-timon.space/commercial_lawn_care_proposal_templatern0y6.pdfIn PDF document text
    • http://yildirimotobursa.com/gabriel_kuhn_and_daniel_petryp6w6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421042/normal_5ffd240a16f87.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/sniper_ghost_warrior_contracts_cheat_traineru7fap.pdfIn PDF document text
    • http://xotuvezaramapez.22web.org/collage_software_free_for_android_mobile.pdfIn PDF document text
    • http://kernig.online/punctuation_worksheets_9th_gradem9p45.pdfIn PDF document text
    • http://eagleaff.com/wuvasarizozozanefovovitakvkqoa.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/xirixepo/homebrew_item_template.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/16893155952.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/vimeo_video_er_chrome_plugin.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/xenogusakufaf.pdfIn PDF document text
    • http://lanelubeberasi.rf.gd/spotify_premium_apk_cracked_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/werijavenizoviti.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC7 5344 bytes
SHA-256: c3e96af037c2c0e442609827a4ce63d9597447a27bdba75d789d7dd744327be0
font_01_sfnt_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 10188 bytes
SHA-256: f3ff69d68a47fcd41585824fce47a9f8a15137d4bdea49cc3ca6b21211a9209f

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