Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0c83dc15c82cff…

MALICIOUS

PDF

64.9 KB Created: 2021-02-19 09:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 91b85314e365af46f46da660eb81d679 SHA-1: 1e3a328bb00be51002d6fd9f8ba1fe138c6f11dd SHA-256: 8d0c83dc15c82cffdf3bd721b06d0c0fe2a986523cbdb0434281084791859b38
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=i+understood+that+reference+meaning PDF link annotation
    • http://podarokinsta.online/book_report_format_for_fourth_grade09syh.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/taxowutuvarovibinop.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/31093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_601dcc21207fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5fe297241eeca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_602cf8d2e7568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_602cae6be6321.pdfIn PDF document text
    • https://fipowawebes.weebly.com/uploads/1/3/4/6/134601566/domozijomokegin.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/potofaw/xovumowaral.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/absorption_chiller_working_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/coreldraw_x8_full_version_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_off0000c1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FA 5340 bytes
SHA-256: 73e07da3cd76a6af3b73cd6d98353311c1eefead3cb1a226b8308e7d98ba3123
font_01_sfnt_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 10272 bytes
SHA-256: c39c3aa85ee18f4dedd84b4e89d80e8bc143f502ea490dcb78861c9ba1b1d2a2