Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57dd52d50474a9b…

MALICIOUS

PDF

67.0 KB Created: 2021-02-14 01:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2666bb31520e0572d73fe47d8ba89c90 SHA-1: 876a6fce26f6887e9de6d6497f5c4e9d7e189ccc SHA-256: d57dd52d50474a9b3b647f963d5df3bf977f5e1dc4c3925623477de7862b49b3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=ar+verb+exercises PDF link annotation
    • http://rijupoxog.22web.org/free_powerpoint_templates_2018.pdfIn PDF document text
    • http://buylettersonline.com/best_free_movies_sites_2018xj1ri.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/XZihhiL/11746947741.pdfIn PDF document text
    • http://tizezs.xyz/mechanical_energy_meaning_in_scienceo6c7w.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/25ie3Ii/27525314076.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/h0iazhd/wejafewazodekeworujiko.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/ihOhcji/e_pluribus_unum_stranger_things_recap.pdfIn PDF document text
    • http://smartycredit.info/58200688101rne7y.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/GtsqRjc/dead_ahead_zombie_warfare_hack_2019.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/varoximu/gawaporikefudunuto.pdfIn PDF document text
    • http://nixefafezas.rf.gd/vukesativogikupaxu.pdfIn PDF document text
    • http://guxodolabisiruj.epizy.com/xapalanuf.pdfIn PDF document text
    • http://dogamesesokuj.rf.gd/moses_basket_sheets_for_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/bamaxetegimatuvag.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/source_sans_pro_font_family_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/pobuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/43819230185.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/proton_vpn_premium_cracked_apk.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_off0000cac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC1 4808 bytes
SHA-256: 9ac4f7e06b5573ab7b28ce3e19bbf0a149eaa8174fe4363f045996c6cbabe8d7
font_01_sfnt_off0000db39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB39 10580 bytes
SHA-256: b1421fc554879cd644dd70c9b06f614ef67c82cf0447fd226d8076d4a5ccc130