Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f9ce95ed791e79…

MALICIOUS

PDF

71.0 KB Created: 2021-02-04 17:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: be531db60cb33405f9fc756a287825da SHA-1: 2fedb1cbef7f16cf1dcb567372b0498f4fdc4652 SHA-256: 21f9ce95ed791e79ec39233920c1e499f08053b102f17c354618802a806f812f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=lithium%20ion%20battery%20market%20report PDF link annotation
    • https://cdn.sqhk.co/safovokon/cghjcjd/infinite_bowling_mod_apk_19._01._3.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/eCpD1hi/rixolegeraraxe.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/JLaghgc/komunovozijefomunilokex.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/kozup.pdfIn PDF document text
    • http://kejamezegujoz.iblogger.org/battlestar_galactica_miniseries_free.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/lafurizafijunul_galovim.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/gdYhfjg/callaway_golf_clubs_for_sale_ireland.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/leteraxewe/guideline_nghia_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/palgrave_study_skills_critical_thinking.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/69668542967.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/crystal_report_8_for_free.pdfIn PDF document text
    • http://novosumagib.epizy.com/jumuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/ccna_module_4_chapter_1_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/67708943590.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/xogiberivujobet.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_off0000da8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8C 5096 bytes
SHA-256: 3e159ed6db2e5c5108f256c57654b3bdf14d4882683ff4ff9fe57f970b55f867
font_01_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10564 bytes
SHA-256: 2561d130dc308372e991a6831f6496a8ac91db93933ca6cff5a18e3b12ea05ea