Malicious PDF — malware analysis report

Static analysis result for SHA-256 09826b8a05439b3e…

MALICIOUS

PDF

78.8 KB Created: 2021-02-05 15:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4ca139e17f4043dd37b459b3116208e4 SHA-1: 0d3ae642cae01c7f4a785d9b79f120a69beaad96 SHA-256: 09826b8a05439b3ef02e96d414490252852c8af8eb26c49e77af563c8e531ade
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://maypoin.ru/123?utm_term=1+kg+gold+price+in+usa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479917/normal_600bd1f335890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_601661e9c0615.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/kujejoropenesidolan.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/iaMCPHF/xatibigavibepinivisufuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/tasewapimol/9CmTOih/arijit_singh_song_ringtone.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/7908920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fca7d2ea4930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_6002d52763857.pdfIn PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/devinuze_posuke.pdfIn PDF document text
    • https://vosanodamenero.weebly.com/uploads/1/3/1/4/131438282/8551962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5fe2ef6fa90a3.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/kidiruxumeto_fijokulidilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5fc729f2cb3d3.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/exghha5/jibalazipasenawilin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_600dd9a47b555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 5260 bytes
SHA-256: 79581dd984d352c5400101b6344b1e258315dc2eccebe6b7e916cb31cecb78ed
font_01_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 11232 bytes
SHA-256: 48faa45d6d5e95654e1de78f5fd176a16852129711afb73e3345dc5b80e8f764