Malicious PDF — malware analysis report

Static analysis result for SHA-256 646b9ac2bcb93fee…

MALICIOUS

PDF

72.7 KB Created: 2021-02-15 00:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9bd65f33b31bbfbada89df25ba0c1876 SHA-1: f5980804a85376102005dcf9fe3622042269ae43 SHA-256: 646b9ac2bcb93fee240b92ee5f906caa2b957c006c6e55a5a225a638820b22e6
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://seumenha.ru/wix?keyword=parallel+structure+worksheet+rewriting+the+sentences+pdf PDF link annotation
    • http://com-signto6.xyz/halliday_resnick_krane_physics_volume_1_5th_editionc6x1l.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/ifKiihh/julazonuzono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_602049a53d661.pdfIn PDF document text
    • http://summ-green.fun/antibiotics_classification_based_on_spectrumaezua.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5feb43123e783.pdfIn PDF document text
    • http://webdefilmizle.com/81398679283m8y67.pdfIn PDF document text
    • http://neojust.ru/kinds_of_sentences_according_to_structure_worksheet_with_answers9sp2l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5fcd99352ce0d.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/bokexizometun/bloons_tower_defence_5_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/40274690159.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/font_bold_textview_android.pdfIn PDF document text
    • http://vulomalizekuvu.rf.gd/anime_tube_unlimited_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/26590993867.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/62362796999.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/brother_birthday_song.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_off0000e019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE019 5576 bytes
SHA-256: ec1f8223407782523a29c10d8d9399bdd7c166b2ebb5de8b68707fccde1e16d8
font_01_sfnt_off0000f31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 9948 bytes
SHA-256: d2a3f9e1c426c34c407bced69faf171b0ede29a4a52a95c20c30e43e9df5d444