Malicious PDF — malware analysis report

Static analysis result for SHA-256 26155fbbd5317abe…

MALICIOUS

PDF

64.6 KB Created: 2021-02-25 22:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f402783ebdb08e0795e5fa17c4c5b6a5 SHA-1: e39cc709258420ee269257ebc69db28e4d4c4b02 SHA-256: 26155fbbd5317abe3d050485736777b840c77acdcc0e35ba5bf76645e2f7dff7
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=one+direction+mama+de+baby+lux In PDF document text
    • https://cdn.sqhk.co/vofemolat/ff85iad/roller_sky_balance_ball_foam.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/29745f.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/cyber_security_course.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461786/normal_5ff420d3ec824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_602ba13fd6b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_602774f1c2825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5ff64faec997a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_6003e7bd636da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_60258df1d1ec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467915/normal_5ff7682ae360e.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/mazaxenunokod.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/zafirawit/9137298265.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/vermont_service_center_email_address.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_off0000c2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A5 5244 bytes
SHA-256: 9fa42ce33d1d0af31a55d8f4659ad550b1ee5535eb7b01c882d936bb92963762
font_01_sfnt_off0000d463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD463 9736 bytes
SHA-256: fb2f121785939948fb7dcaff39295ea62ee3df1d16c0274c6da61660819e6d02

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