Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c82c3ef4527e56…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 08:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e21c7efbc26712c66015b270d078593e SHA-1: 45191d50472713b5094ef57cca73ea9ab97828ee SHA-256: 67c82c3ef4527e5663d66ca5d678d6c339ca6021ff1e02b468a1842c815d7256
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://pelibifir.ru/award?keyword=aa+set+aside+prayer+printable PDF link annotation
    • https://xosaxunifepin.weebly.com/uploads/1/3/0/7/130739048/1458581.pdfIn PDF document text
    • http://topchambre.xyz/xozujirowajovabadexefv170.pdfIn PDF document text
    • https://zobilajes.weebly.com/uploads/1/3/2/6/132682335/xamitudij.pdfIn PDF document text
    • http://dreabling.online/monkey_ball_race_gameqsoi9.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/40258e4.pdfIn PDF document text
    • https://gegirugotosizuk.weebly.com/uploads/1/3/5/3/135397722/judapugamaz_bujagonefa.pdfIn PDF document text
    • http://ostanni.fun/773116614494wp6n.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/ehhIOjd/zenulalobunudoxulorunebu.pdfIn PDF document text
    • https://radobejaka.weebly.com/uploads/1/3/5/4/135400195/7042384.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/jivagajamav/android_studio_install_sdk_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/catering_services_management.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/bawolubonixixo.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/49764105504.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/bokiresojip.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/tunukomobufur.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_off0000e2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 5184 bytes
SHA-256: 09ca783e3e61126c5bd57546ddd9bf0abd32851da0622b6c67833aaf084e24b2
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 10208 bytes
SHA-256: 4f0ff9f77ce09d31c4a3a9b330c17720d81d5936b1d12ce790548a485cca55ce