Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f3dce4c27a845d…

MALICIOUS

PDF

72.7 KB Created: 2021-02-16 10:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d65b6910f0a6e5df3bf60a4469e013dd SHA-1: 5a41622df09129572dd0727639240aad2dfc858e SHA-256: a8f3dce4c27a845d9867799debde8db3ea4a0a973092134b93d49bfba15d7eb1
194 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
  • 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=mastering+the+teks+in+world+history+3rd+edition+pdf In PDF document text
    • https://jubabanijawema.weebly.com/uploads/1/3/1/0/131070146/gavilipase_kazol_jatok_mezinosupuwin.pdfIn PDF document text
    • http://fodadasome.iblogger.org/27995561586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_601d6e291ecf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fc7545f89b99.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/gezimuxunuzamebufutasunu.pdfIn PDF document text
    • http://cetakchantek.com/36292922531vg0f0.pdfIn PDF document text
    • http://wovegibexakebof.iblogger.org/club_controller_amapiano_remix.pdfIn PDF document text
    • http://ipoteka.net/69435725217zzbrk.pdfIn PDF document text
    • http://interbankdigital.com/burger_king_canada_coupons_2020d2zky.pdfIn PDF document text
    • https://senalikede.weebly.com/uploads/1/3/4/1/134108961/puzapu.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/luropiw/maduvakunulavunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/56798219435.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/oracle_iprocurement_user_guide.pdfIn PDF document text
    • http://patabajisof.epizy.com/wevalop.pdfIn PDF document text
    • http://segoxegigo.epizy.com/h_t_n_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/best_budget_android_phones_2019_usa.pdfIn PDF document text
    • http://kisomelug.rf.gd/wivepabugaxobifobufiw.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_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 5728 bytes
SHA-256: 72340d7a5682be996c4c70586f52b0a7d8563ea36ab9cd401955d8210da05de0
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 10240 bytes
SHA-256: df91ec484bdda5760fe99a6a1c5f85d5ffe30603bb29743860d8dda506360410