Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4307c241454111…

MALICIOUS

PDF

65.7 KB Created: 2021-02-02 21:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7f9fa8a4472d3069715da41ba4d4637c SHA-1: 1249d3ced836ec7a5f4d4a6bb3bac25e9ef3cab8 SHA-256: 7a4307c241454111b7a6d2d4b1c3f19e7453d72deb5ac5b12d48325b61380519
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://jottigo.ru/aws?utm_term=bandar+uniformes+colegio+rio+branco PDF link annotation
    • https://cdn.sqhk.co/xufaribo/tjd4Cum/49030886841.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/cgeunSI/28026763440.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/Y8LeMQl/61458158279.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jasYIhe/xojezejorivunabalapab.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/xidazeze/supra_negritude_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/cymera_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/7614187664.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/37406844746.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/95702628768.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/30359226016.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/native_app_banner_android.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/mugedasewador.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/what_should_centurylink_speed_be.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/48307588297.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/tafadipi.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_off0000c2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C3 5532 bytes
SHA-256: 527a14587129fa727a2d5bb20db2359ff21735ac0e378b47d7909fcbcc3b8486
font_01_sfnt_off0000d57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 11112 bytes
SHA-256: c918bbcbc7eca6df001e1a83d75054f49ce18117556246dafafe97dcc26fb868