Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf3af3a51c8ca20…

MALICIOUS

PDF

72.9 KB Created: 2021-03-04 01:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed89ec5aedce0b26e2ac72fe35c84f57 SHA-1: 2e8e1632b3de92f0cc49c1ac38c808ce1493b1e5 SHA-256: dbf3af3a51c8ca200940aada05c24a210efd01ffa1c2e65345a0d6bdb7f3c9fd
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://midufefew.ru/wix?keyword=don+quijote+resumen+por+capitulos+rincon+del+vago PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448341/normal_5fdd0e43b1fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_602f114225191.pdfIn PDF document text
    • http://wosuxetomokife.22web.org/6195298682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_5fef1aa390a5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5fe4f527c0e5d.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/adjective_sheets_for_grade_2.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/eibeWzv/74794487635.pdfIn PDF document text
    • http://bagadiwep.22web.org/factoring_trinomials_quiz_answers.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/wupagivoz/chirugale_vaste_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/pokemon_crystal_walkthrough_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/84270531960.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/adithya_varma_bgm_zedge.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/22457864648.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/sudiwovone.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/xamarin_android_bitmap.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_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 5656 bytes
SHA-256: c78f062b5c95bd1124f5ee13e50dfad5ba1ca7253be2f52502a3900798e202bf
font_01_sfnt_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 11388 bytes
SHA-256: 581d50517d3e4d440fa83b962c4990d5ff4f61d27498a100e1112a9c7c64ccb0