Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a8475c76c76be1…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 23:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e2f62d24d7c54e9fe70eb9acdf39871d SHA-1: a04e1ba7552149315fb182a582f37b1594ba2913 SHA-256: d9a8475c76c76be1dc444033b7c3c0a81ef3b8ec637788bc51fdb4e6cafb18d8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=bonk.io+unblocked+games+at+school PDF link annotation
    • http://naykaryadom.fun/buwudafesubott79po.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/vavegumolixoju_moxapajapofol_gezuvakisime_pidojanobakutu.pdfIn PDF document text
    • http://simultaneously.space/26345806985db44a.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/dUIggha/4628028854.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/hchgiht/93605024194.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/igeidhi/nujunipulexitagu.pdfIn PDF document text
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/7ab0f.pdfIn PDF document text
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/d1a18a62f2c92.pdfIn PDF document text
    • http://003-center.ru/23314790958eiyh.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/ragejufa/86810279807.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/31040687562.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/89127105268.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/mckinsey_business_of_fashion_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/69019901235.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/41267523628.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_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 5540 bytes
SHA-256: d8e4121399e1f494dd703af23f5341f73af2057b076d3d75cba1c2ff1581d638
font_01_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 10256 bytes
SHA-256: 82ad62a651ffeb2be3aabe4a398eae597bfa41ebaf6cffa87a7124ce2d73d883

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