Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61b1f6039e13c55…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 02:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0a1238900f4d618ec340f5c347b04533 SHA-1: f54238a6c5a299574fa44dc65a52f1314ed3bf6e SHA-256: c61b1f6039e13c55bdf1f0b6d06b3c6125648edde1700ad9155d449dfb80f826
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://dugedepap.ru/award?keyword=how+to+solve+ratio+as+a+fraction+in+simplest+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fe812369460d.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/how_to_change_nc_license_plate.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/83237066205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386606/normal_5ff430eb8237d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_6021a74fc39d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387031/normal_5fdd0fca57b0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448548/normal_60339a0675e25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5ffb07102341a.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/80850193472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_60312d31d7dad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5fe4f00c25a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_601369dc22c71.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/how_to_activate_my_lg_tracfone.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/widuxade/camping_merit_badge_worksheet_word_document.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/tivegugeke.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/fakiduxo.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_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 5276 bytes
SHA-256: 70707c9d810e434dbf27a2681642190a145c057032c17b981b660d6acb50d564
font_01_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 10656 bytes
SHA-256: be3ab2953b6115699ff32d3717aa4e9b0eb283f9fa02c3ca84a2411f35056d2c