Malicious PDF — malware analysis report

Static analysis result for SHA-256 4152db802fef1f89…

MALICIOUS

PDF

73.1 KB Created: 2021-02-20 18:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5181e2deb8bb05776ae3140f5c133a35 SHA-1: 558d63c1631c44e9f930cb464d41cb2cff8683f9 SHA-256: 4152db802fef1f894aa524bd3ca995e3cb39acb637124cde4ec15a4193913b5a
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=nota+de+venta+rise In PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fdec746c07f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_60238374ad0f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_600b99ca2f46e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458635/normal_5fec1b0813611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5fe74eb57ee2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5fed99683b477.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_5fdd3906cf4cd.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/setaxilitozuko/6916601226.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/electrical_cad_blocks.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/agricultural_revolution_in_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/anemia_en_nios_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/either_vs_neither_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/18844110864.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/8611122613.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/tuvinagaxulerates.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_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 4816 bytes
SHA-256: da3f48c3c4f88fdb56a39fa175bfaa4a3ad301621eca1b77c2f20cd78c97aa28
font_01_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 11992 bytes
SHA-256: 37843ae707905cd442f2fd91dcc7f34f2713535548c33db2580f58e0dd7ba3e1

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