Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afa307db6a98cb8…

MALICIOUS

PDF

76.5 KB Created: 2021-02-25 01:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3b4bcbdef4c8e7802a893bdec9c48e57 SHA-1: 4fde54fafcf3e720c8f397d67dbaed8614848b73 SHA-256: 6afa307db6a98cb8a706cba938c9241491875b9a64edcf63e4ecfe6ec35dc686
136 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
  • 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://bologen.ru/award?keyword=the+singapore+story+from+third+world+to+first+pdf PDF link annotation
    • https://cdn.sqhk.co/vikoparif/ZHGXiah/wiwanebomutot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_600d156be7f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_603425a5299a9.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/ih1bjgc/fomezerinekimomulok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_6036d5e0e1e4b.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/golepe/aggiornamento_android_9._0_samsung_s7_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/53293773278.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/63228515788.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/sql_server_2016_express_sp2_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/dangerous_fellows_eugene_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/45906830929.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/lg_lmxs30776s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/anatomy_of_ear_file.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/52790966580.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/loud_alarm_clock_apk.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_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 5600 bytes
SHA-256: 52c6e9eac65ff119bce37750f02c0b2cbd6d9dd3b1e12e4f4048616e612b073f
font_01_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 10184 bytes
SHA-256: aad3334e6ffb92216c43f60953762857f7ab8604d294357ffb0f5f93469dff3c