Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb4bb07c05cac2a…

MALICIOUS

PDF

62.1 KB Created: 2021-02-16 23:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: aa4bbf637e37f52ad7946f7441ab644a SHA-1: 4716da58d4f85ae00bd661b5ea0c759372bc5b30 SHA-256: 6cb4bb07c05cac2a72d8d2c8dc116553925a0b1e172cce5484ab0f319333102a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=tronical+tune+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5ff7a18310ab1.pdfIn PDF document text
    • http://doorstepcomputers.com/wikurimasidotupopifuvavvef0b.pdfIn PDF document text
    • http://sallely.xyz/calligraphy_writing_fonts_freezjm68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386086/normal_60088d5e9551c.pdfIn PDF document text
    • http://meetsol.xyz/pathfinder_character_sheet_editable04f25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446162/normal_5ffef4f275933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_5fd7f8b1b541e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcd5b2b68421.pdfIn PDF document text
    • http://fakaripeti.xyz/vobugujomxxesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_601b188bd302a.pdfIn PDF document text
    • http://poverkavoda.website/triangle_inequality_properties_worksheet_answersdih8u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_602bf9a44397e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fc7bd9886fab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5ff282bbcc808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6018bc05d1b2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FD 4876 bytes
SHA-256: 4de4c46193325b79263c957c1d4d8eaa444c8eb17bbe6b2b3cd6b8e1784e552e
font_01_sfnt_off0000c99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 10072 bytes
SHA-256: b704b04c10c119a32266a66cca3e29827a766f5aa5a1f0cdaa140d3e560c7c71