Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3401f4421639c5…

MALICIOUS

PDF

71.8 KB Created: 2021-02-11 01:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c0ab4bcf2ea9607cc5f5785bfcf52cff SHA-1: 7db8c6a15ce1158af05b9a945cc0e29d40edf21a SHA-256: 3d3401f4421639c58a3634efabbe1c20b257c8bf7e3272457ef6ba9b9b7f6db2
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://leonvi.ru/aws?utm_term=afro+cuban+rhythms+drum+set+pdf PDF link annotation
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/zijano_nedijuberubeta_jekago.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/vugote-rafamivojam.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/jighgeL/bedrock_tools_addon_mcpe.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/hUpgiig/61434603050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5fddf5ec220e4.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/Ziaggic/rc-_airsim_rc_model_airplane_flight_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/asshbgS/jumixigare.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/i9jbrm3/live_youtube_subscriber_count_brawadis.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/ja7Yoci/little_fairy_princess_makeup_set.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/7747424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_601c61727ae31.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/hcjjaib/radevuwebukovufi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5ff2c79893027.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/giM4tgc/40803212310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5fc7fcfe28ffc.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_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 5592 bytes
SHA-256: f418b3bcf028e62c5ac28ed01fc8d7f14a973a2cc0e9935e8b85f5643f4af849
font_01_sfnt_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 10532 bytes
SHA-256: 14cae1812ff21aefa9568116d5413b14a86260a969586303579d1df9bcbe5326