Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a44a4c91311418…

MALICIOUS

PDF

80.1 KB Created: 2021-03-08 19:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2844cfcdac720dd5acf270130a6c1768 SHA-1: 15bc1878ece3e22269b2ebe8458a0c8c0fa43c25 SHA-256: 89a44a4c9131141894a8eea6c4c95b6e90f3babf47ab7d532fcc7bd5bfc4c416
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://kuzutuzo.ru/aws?utm_term=how+to+practice+phonological+awareness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421200/normal_60374dd674182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465267/normal_5fdf39fc637e1.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/hunter_xc_sprinkler_system_not_working775vg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5ff4a73e336fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487423/normal_60092edd705ef.pdfIn PDF document text
    • http://viluzuvegozawug.22web.org/photo_ki_file_kaise_banaye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_6009eab3ca9c0.pdfIn PDF document text
    • http://asia.kiwi/buzarafibitomexukofit6rm8.pdfIn PDF document text
    • http://jotipire.iblogger.org/audit_report_format_of_llp_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5fc5f3fa3bdd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fe66e4cb2f48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393364/normal_5ffde91b1d95e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_5fe6ecdc505d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_603686d1c513d.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/dobikasukavu/kelojodi.pdfIn PDF document text
    • http://sefawip.rf.gd/how_loud_is_a_honda_7000_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/31489822601.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/what_are_behavioral_skills_training.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_off0000fc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC25 5248 bytes
SHA-256: fc89edc4137950732bf48c3848b4c1d09c1fcfd6ec783b49e38ca475f83d2eab
font_01_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 11068 bytes
SHA-256: 358a81721117e20fe33cb6d07b982c515511c92946eea6278cf2c9d81343d9e5