Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7233111810e519…

MALICIOUS

PDF

63.3 KB Created: 2020-11-10 12:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 9fd5dea7e33ff279a2a580a723d5ed87 SHA-1: 239ec90e5792b54af8ac51ac7fa1378a17d7f647 SHA-256: 9d7233111810e519a024a551a5b7ade348d2efe659eaea0d382c96a26cb1ae92
196 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
  • 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=the+crucible+penguin+plays+pdf PDF link annotation
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/8ede958dd44936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f97a1dd45fb9.pdfIn PDF document text
    • https://saxigixerugeri.weebly.com/uploads/1/3/4/5/134585582/bajuvurevit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c4b84b-18f6-4cd4-a14c-fc8999f0054f/83880510636.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/best_metric_cobalt_drill_bits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc0eadb-9631-4985-8040-47200c00e9d0/8023984198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d608dec4-cdbb-40a5-8788-bc84fa3f80c8/28759365620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a8dd79-1ec5-423a-a473-7e74ec35cd62/diwisuwin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2071d40-f135-4f15-ac89-fcb4f7b02b8d/37131974300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2bcd06-b138-4afd-88e3-4b3571946c96/movupojore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bbd0f8-d807-4efb-84d0-b3b645b781f1/88546617985.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_off0000b981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB981 5608 bytes
SHA-256: 1d52a46e4e65868494233a797b0b1c502d417a7a76691611d1312e80985cc8ec
font_01_sfnt_off0000cc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8C 10524 bytes
SHA-256: 42e8a28c081adc4ec751b20e76708dd6a64a1099f77cf1ef54d313419ff91363

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