Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cbdb366b8a2210…

MALICIOUS

PDF

71.6 KB Created: 2021-02-25 07:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6f6d9a85a36cecbc30942230daff2600 SHA-1: 6c496db5e0ff0982cdf95e47050b0874e2c5c090 SHA-256: c5cbdb366b8a2210ba82260b8b94bda388752832c262b9b1755f96736615dac1
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://leonvi.ru/award?keyword=types+of+chemical+reaction+and+predicting+products+worksheet+answers+1-13 PDF link annotation
    • https://cdn.sqhk.co/poronujefino/1jbqSgd/manufonavinar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_6005371733958.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/ZighzsX/fakikibokedudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_5ff33c663f75e.pdfIn PDF document text
    • http://fosijez.22web.org/52212627578.pdfIn PDF document text
    • http://gigazukiwizave.22web.org/buloxono.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/jPzzggV/30486630996.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/JRaomif/metrotex_grapevine_location.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6024d02a78df7.pdfIn PDF document text
    • https://cdn.sqhk.co/kusasuzona/dgiZvZv/25186950896.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/gjiCnjb/natural_history_geography_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/f4tjggj/stick_ball_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/dhdq0j6/planescape_torment_walkthrough_mortuary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girifej.epizy.com/puzzle_bubble_shooter_game_free.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_off0000dafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFC 6024 bytes
SHA-256: 8035541055d8fd93fbeb245adebcf7ada5d2e1bfb97d0778587e191eeea20c33
font_01_sfnt_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 9828 bytes
SHA-256: 89875e6a2c849ddb4b2ab3274130a4469ec0f11a8c492da85f0a7098111b68e9