Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28a597c0fb33e72…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 21:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0635e8002080ce8f1fb54178c2ca3733 SHA-1: f856f116296a2b743705a1bd48f983541c768758 SHA-256: b28a597c0fb33e72e103d711d634534489b70f1bafcc3395451ae99484cf9126
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://baarspo.ru/wix?keyword=garmin+fenix+5x+plus+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/gonolesuzam/bij6eUE/gravity_falls_garry_s_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/ZOjaoib/zelevuvoxiwilenozemojav.pdfIn PDF document text
    • http://businessmentality.com/oppo_a37f_firmware_free1jrzu.pdfIn PDF document text
    • https://cdn.sqhk.co/guzelatolina/vjjMhdp/xuxig.pdfIn PDF document text
    • http://smartcoin.design/mending_wall_questions_and_answerst4nxf.pdfIn PDF document text
    • http://9gusevshop.website/coronary_artery_disease_drug_listd529h.pdfIn PDF document text
    • http://yesitalia.fun/583407070060xv5p.pdfIn PDF document text
    • https://cdn.sqhk.co/mogujawogo/jdhcghF/pesoma.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/yZ5wkhe/minecraft_dungeons_dlc_release.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/rewepalazamiso/zemenesu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/firewall_virus_protection_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/all_tenses_passive_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/zosexinofijoxesima.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/bakers_pride_y600_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/11778533086.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bebosazini.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/rafebusenodakaranef.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/apologia_marine_biology_module_4_study_guide.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_off0000d29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29F 5412 bytes
SHA-256: 288d4ad6eab42177e8d12f20282f637dc4a18411672e2ae3ac4bca67a03eed0a
font_01_sfnt_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 10644 bytes
SHA-256: 748621dbee014dffcf6a78fff78dbee3c770e12ec4dd7d6e5700f7daea0d8e9f