Malicious PDF — malware analysis report

Static analysis result for SHA-256 510c0fb76d744369…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 00:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3bb6c94ec7a3837c6b2d89cc004818f7 SHA-1: 710faa2f4986c9f7504313bd8b660d6c498298ac SHA-256: 510c0fb76d744369301649cdb55b25a5082b234e292d9a1519e2a9212c391383
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/123?utm_term=what+is+offside+and+icing+in+hockey In PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/1150448.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/bVhjOrv/kenagurilazudifidubug.pdfIn PDF document text
    • http://afracheat2.xyz/27794974795p7676.pdfIn PDF document text
    • https://redewude.weebly.com/uploads/1/3/1/3/131379671/9024483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5fd04fede6827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5fe2c73835da6.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/hdbbjgf/bullet_time_bounce_tutorial.pdfIn PDF document text
    • https://rolafaxamowoti.weebly.com/uploads/1/3/4/9/134903079/xetuvipaj-wolasapivi.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/supuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/h5iiIhg/90931147323.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403946/normal_5fcfa7b090867.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/tonemakopinibem/jezupa.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/cd-_rom_stands_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/ladupujikiwupefukojagemu.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/vray_for_sketchup_manual_chaos_group.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_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 5332 bytes
SHA-256: 8b0da8188fffaa4bfca830a0ef0ebc7a5bd1d3a44e4eaf6445f95bd67b371e56
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 10404 bytes
SHA-256: aeb008e5e41ef03bbd5462aa63d0aee77aec421bf2767d41b688696e4a258d95

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