Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3805ab7b7bffc34…

MALICIOUS

PDF

74.0 KB Created: 2021-02-11 20:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4a8f966ff8b077eb1e9a5dc436e28733 SHA-1: 542c188845a0f7baedd8d2d8e6305fb98ea592df SHA-256: f3805ab7b7bffc34650cff07b7ac18b235bd948fb29407bc29be9feae3f0a0ad
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://jacksth.ru/wix?keyword=balancing+nuclear+equations+worksheet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fde82b6c39cc.pdfIn PDF document text
    • http://fb-copyright-help-from.com/181869863544k7xu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_601152e9822cf.pdfIn PDF document text
    • http://motuxagajoweji.22web.org/6125880575.pdfIn PDF document text
    • http://levelupguild.com/topunagiji60q00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5ff3066d15635.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/android_studio_shortcuts_medium.pdfIn PDF document text
    • http://yatvoyya.fun/true_story_ivan_the_gorilla_paintingsxhtem.pdfIn PDF document text
    • http://dektesheff.xyz/abcd_tamil_dubbed_movie_in_isaiminizhhtn.pdfIn PDF document text
    • http://nuveclovet.xyz/terraria_world_size_pros_and_consv63f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387035/normal_5ff33b922b75e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_5fd7a08ff164c.pdfIn PDF document text
    • http://vefipitop.22web.org/footnote_abbr_crossword_answer.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/fekazudabo/audit_report_of_a_company_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/red_black_tree_algorithm.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/33456655936.pdfIn PDF document text
    • http://bojonovaja.rf.gd/fozewuku.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/zisorupusinanojubigukudap.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_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 5748 bytes
SHA-256: 7fad5e4c528095c08608fcaecc1a5ec30200ad0b94aa9e3869abfaa3a10ea174
font_01_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10128 bytes
SHA-256: e6982c806112560148710c04c83e31d22d95b3d82054f3292eff1e0287c5b2c5