Malicious PDF — malware analysis report

Static analysis result for SHA-256 3288a1b553c4c038…

MALICIOUS

PDF

78.8 KB Created: 2021-02-15 08:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fab2a5a391a4c3e455d3c8d44c61f68e SHA-1: 452a5037779cd96216b489d3913e918763980fcd SHA-256: 3288a1b553c4c038b7b4f9202a9153e41790b8a78fcb3aaa6727c74bce84b748
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=brian+bell+weezer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_60143c4bd1786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd9e31fe6fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5fd7a923656e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479678/normal_5fe231ce6fbb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_5fdec8a2ceec1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fdf3b8662373.pdfIn PDF document text
    • http://plafond.xyz/redexelokaxorate8flzw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_6002722ab81ff.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/mokamoba/nidevopuzubuke.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/80176730463.pdfIn PDF document text
    • http://wenimawibi.epizy.com/44497535814.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/8098843482.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/timadonexipomu.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/mimewomanumajejiweto.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/coupon_icon_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/iron_man_eva_foam_helmet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/federalist_78_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/6889871216.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_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 4832 bytes
SHA-256: b181f085c08d255779a7a0fa4f52a3e56f1dc214d699c98372e25270ca9c1f7f
font_01_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 10056 bytes
SHA-256: 53d487c0b0e69a4bfbc4e7568fe45db5b2927aff5709d9059bf952ae42bd61f1

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