Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47c1bef5c94fce9…

MALICIOUS

PDF

61.1 KB Created: 2020-11-11 05:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: e42d2f6af9fb11841a16c351c23078c7 SHA-1: 94b02c4c85a78756881bea6741b1dfc295b943ed SHA-256: d47c1bef5c94fce9e7915ff3a93c212fff1d83c357e5ec0a8d26b020eb40411d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://trafffi.ru/123?keyword=ark+snow+owl+saddle+spawn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f875c80e6c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5fa567a18a013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f9b83a087810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_5fa12ab949206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5f8cc6db8dab3.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/kibukom.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/guraxogerab.pdfIn PDF document text
    • https://pezujotage.weebly.com/uploads/1/3/4/3/134318684/1974297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5631b922-680d-4889-8afc-359dabf04cd2/14007934057.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/arun_sharma_data_interpretation_and_logical_reasoning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D1 4760 bytes
SHA-256: ebbaa4a81a9da191d9ea60624d16a102d8eec7650e52dfb41a4e290add5e847d
font_01_sfnt_off0000b80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80D 9932 bytes
SHA-256: 9d8232bfe7382784170f9ec3e77a69a50b0654525e7ee47a8d019a7c137729e8
font_02_sfnt_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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