Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4cedda8d41cfea…

MALICIOUS

PDF

76.2 KB Created: 2021-02-25 22:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 938322d1568641a56c7d161e58f01023 SHA-1: 6a17988f7edbcbc226606114a2d39bfbcca782dc SHA-256: 8c4cedda8d41cfea85a7203e3ff11358c47e95023c6e739d3f037ad958231a94
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://jacksth.ru/aws?utm_term=how+to+learn+a+good+english+accent PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5fdd9655f1443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446924/normal_5fe3aee324a1d.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/gcijcMU/geometry_dash_lite_secret_achievements.pdfIn PDF document text
    • http://dowezujuzuzos.22web.org/pekeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fcb109c95189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fdcbfc76a350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5fe1ea606de21.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/how_to_cut_triangles_for_a_quilt.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/hdn9gii/3121931741.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/sowirutelevolur/video_er_professional_chrome_app.pdfIn PDF document text
    • http://sivuvupaxiju.rf.gd/majagirexafin.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/joveka.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/33518892441.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/fazozulolasaxanedubegodob.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/academic_research_poster_template.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_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 5252 bytes
SHA-256: 59c30296ba3e56b1a01517617c51bd63cf96266dd2573b9c35e48981cb28f6e6
font_01_sfnt_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 10684 bytes
SHA-256: 0844a1713d4c7291954c4d1196334cb956ae9ff467a760e8845da125e5f40cd1