Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b17766cdb76eee…

MALICIOUS

PDF

70.4 KB Created: 2021-02-04 01:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6558945f3b8c75daeba0b1ac91d03974 SHA-1: 20b9fdeaeaa3deb32b9239df191d1565006913f2 SHA-256: 36b17766cdb76eee291cf1abd5aab1ff60d1c775176f34d66c5de4d7c565b343
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://druttle.ru/wb?keyword=legal%20internship%20interview%20questions%20and%20answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5ffb1a8d3857d.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/hihOPgc/zefagizozo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369919/normal_5ff1b4c566e3d.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/ghGhhED/48098458378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417403/normal_5ff2a62051094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_601636005e4e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_601877031972b.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/pjchjXX/30015349823.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/farefasejikap/himedia_h1_4k_android_tv_box_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/vizipufefuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/somulojisinujujezolosawap.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/vadokezovofiwim.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/bigo_live_hack_apk_mod_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/funny_cat_sound_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/dawson_city_canada_weather_report.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_off0000d79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79D 5440 bytes
SHA-256: d1254dd85ba9048c45596c6c611f8f82ba893f103ba237cb7a16a5efe349ebc1
font_01_sfnt_off0000ea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 10200 bytes
SHA-256: 4d39cc72745c2633298dcbb3d5455082ba5f1d9fb651dce5e8b17fee2388fab9