Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df3f4985084acac…

MALICIOUS

PDF

67.1 KB Created: 2021-02-14 16:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ae60256584018c052b12f26a9ccfd20a SHA-1: 1b17a80843900b38b62e9a7a97ae07e1e461e755 SHA-256: 6df3f4985084acacdcc7b7dc8a10842456a02e659e53827964c0324dfd3558f3
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/wix?keyword=the+cricket+in+times+square+chapter+1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468540/normal_602037fedd6aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5ff1f58371273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_6023f9887cfc5.pdfIn PDF document text
    • https://cdn.sqhk.co/wosinuwukabu/gehanNs/57283601403.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/d74ja9c/mediamonkey_gold_key_code.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/iu8OdsE/90614666108.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/donupekejikag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5fc9548f21652.pdfIn PDF document text
    • https://vopobibipudo.weebly.com/uploads/1/3/4/6/134620476/3135824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_600eb0eff0491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5ff9d327a5212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484156/normal_6001e40b28ad3.pdfIn PDF document text
    • https://pefojefevofat.weebly.com/uploads/1/3/4/6/134659321/xazuxe_bukij.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/vojapu/kefik.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/mecca_crane_collapse_report.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_off0000ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 5556 bytes
SHA-256: 712bcabc8a1eae8e956d911f5c96654b386876d60341877872716d592996d362
font_01_sfnt_off0000dd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 10096 bytes
SHA-256: 047225f492e1f4c6f5fbe5abf65b30517cfab3622c43a07bac2d81a2678385a2