Malicious PDF — malware analysis report

Static analysis result for SHA-256 398348d290ba969a…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 14:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0d312664ebad6a7e076dd95dfe107765 SHA-1: 33ad96cf8309a0e51b3545a4a93c396107cc30e0 SHA-256: 398348d290ba969a9d63d8821a576793a3c35204fc4ea9bd374f560be047b233
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/award?keyword=how+to+fix+air+conditioner+leaking+water+outside In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_600979041cefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_601197b947188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_5fe8f7e3e0e50.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/giWhcje/swot_analysis_template_word_2007.pdfIn PDF document text
    • https://zasosefudasu.weebly.com/uploads/1/3/1/8/131856937/nerenenubixofi.pdfIn PDF document text
    • http://nesobaka9.xyz/al_quran_mp3_free_download_for_mobileeggnp.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/gjr6Ujf/celestial_spanish_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/xipovowimugo/ihvMUkf/63294771651.pdfIn PDF document text
    • http://yogist.fun/bosozikt207v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favolaven.epizy.com/bulave_tujhe_song_video.pdfIn PDF document text
    • http://xofopok.epizy.com/10488135260.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/european_guidelines_for_inguinal_hernia_repair.pdfIn PDF document text
    • http://gifesikubelazu.epizy.com/burnt_orange_silk_formal_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/where_to_buy_commercial_freezer_doors.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/grammar_quiz_high_school.pdfIn PDF document text
    • http://kopuperoki.epizy.com/15276369081.pdfIn PDF document text
    • http://julizut.rf.gd/xotuzuvatur.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/28653971120.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_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 5372 bytes
SHA-256: e3e4801dd1428213e6ea8d2d8b1aa834f521289b3130b831fa8fd6f9fb54eecd
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 10828 bytes
SHA-256: ad35779b3f41aacae1707f25eea1348f99b6aa575d8f8f83a61b7f7a6ffd2e83

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