Malicious PDF — malware analysis report

Static analysis result for SHA-256 837f226fe329faf5…

MALICIOUS

PDF

69.9 KB Created: 2021-02-19 01:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a5c007371b2c54ce9f0ca62976774d12 SHA-1: 68e0273588503025ee0854b2f8583f9b522b17fb SHA-256: 837f226fe329faf512faea977be2341a24a83dc3d453c1bb9a121d4c1a54641b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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.
  • 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://leonvi.ru/wix?keyword=steel+ball+run+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/gobenebovi/csljiM3/new_mini_mastercraft_2020_uptodown.pdfIn PDF document text
    • http://islemleriniz.org/52706279399stoek.pdfIn PDF document text
    • https://zuvumurujibuza.weebly.com/uploads/1/3/0/7/130739557/rewesejijiwu.pdfIn PDF document text
    • http://zatorigixoluji.iblogger.org/12133267453.pdfIn PDF document text
    • http://artyom.guru/sakivapekesesobikonqg1z.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/GOjf4hh/55410645409.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/wefebulepazopowuwe.pdfIn PDF document text
    • http://nextauto02.ru/nietzsche_beyond_good_and_evil_walter_kaufmanny1nqn.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/gqjgPjc/war_of_the_worlds_musical_tour.pdfIn PDF document text
    • https://gasovopur.weebly.com/uploads/1/3/1/4/131453365/kakonesolozowezega.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/iQGidi7/the_third_day_explanation.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/dekogamik/yugioh_duel_links_starter_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/14737634925.pdfIn PDF document text
    • http://sesunofopum.epizy.com/asphalt_8_airborne_soundtrack.pdfIn PDF document text
    • http://rutipozi.epizy.com/bootstrap_grid_css_only.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/anemia_falciforme_hereditaria_porque.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/carbon_cycle_worksheet.pdfIn PDF document text
    • http://dinixebun.epizy.com/59261840678.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/apkpure_pc_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/fezex.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/lagu_balungan_kere_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/pt_charoen_pokphand_indonesia_annual_report.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_off0000d26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26C 5488 bytes
SHA-256: 3787e2ed55b41968ad979cef7995e7ec764f9e75a1a966ac955dc87e447247e0
font_01_sfnt_off0000e4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 10408 bytes
SHA-256: 74aaebb5fb5d2a52493700ae57ad168128c4c1ca3c9e9689ff02ed3a930777ba