Malicious PDF — malware analysis report

Static analysis result for SHA-256 347c6d1a8889d424…

MALICIOUS

PDF

65.6 KB Created: 2021-02-14 22:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 94197b61b0ba06cfe3746a78e96fcb4a SHA-1: defc02272111181c7d93dcf4898a8d54585008b2 SHA-256: 347c6d1a8889d424932c9303839c881f16dbebbe480d73324eefd24ed2c694bd
196 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
  • 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.
  • 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://bologen.ru/wb?keyword=alpha%20test%20bocconi%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426087/normal_601121cdb2a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd0d5c9c509e.pdfIn PDF document text
    • https://tezubowaxax.weebly.com/uploads/1/3/4/6/134640868/mugon.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/1050188.pdfIn PDF document text
    • https://nidegezepon.weebly.com/uploads/1/3/4/6/134650885/d50c0247995f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fec900785a43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416787/normal_6004fbbb015f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_601b69e7ce168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fd2aed6c2687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_600fd60ce54ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_601e8912dc7a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5fcbd4957ac2b.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/legenapi/4423573001.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/free_printable_border_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/weather_report_of_today_in_lucknow.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_off0000c2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A7 5276 bytes
SHA-256: a3a5c522f2fe2e3d03264cfddc272e3065db73d1d5b1aa81dc2ed2f398477684
font_01_sfnt_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 10968 bytes
SHA-256: 0e12bbbd78d6647d52487ecf037b2d9d5c426e54ddd792332d743249fa86dee7