Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7f1ed2a3924bd5…

MALICIOUS

PDF

66.5 KB Created: 2020-12-21 17:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ec40f00ee53d61f35ad98e3900195e62 SHA-1: a77e8cb80f80204943cc3c75be0e5f20fb1cb823 SHA-256: fb7f1ed2a3924bd5164bc9654f0aef1ac869a10cdffa4246c80ebd03fccbb57f
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://trafffe.ru/aws?utm_term=best+5e+character+sheet+app+android PDF link annotation
    • https://biwoxigaluna.weebly.com/uploads/1/3/2/6/132681579/mukuxaxaw.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/c899129cb01.pdfIn PDF document text
    • https://denibizokitig.weebly.com/uploads/1/3/4/3/134340328/6950ba050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc59aeaea4a794d566534d6/t/5fc65c503570fb44d1dc5605/1606835281396/79423252260.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/kikaxuxuluxolebuguvu.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/easy_spreadsheet_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/batusod.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/90085386350.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/libros_de_fibras_textiles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c3a8c0-1e74-4bd6-9065-109be97e5748/4011430835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad745d10-0435-48b4-8f03-913b2732697b/vortex_fallout_4_vr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b3f4ec-a976-4e21-bebe-2ad22234eac5/96814212001.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57785be9b69395129ae53/t/5fccdcf6eb18547f4b83cb74/1607261430906/green_bubble_tea_oakland.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/how_many_calories_does_50_pushups_burn.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/total_audio_video_converter_apk.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_off0000c78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78A 5304 bytes
SHA-256: e9130b7db0ea2a1d13223c7ce63bbb8ef9dbd6b76366e306d079f3759b46e50a
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 10460 bytes
SHA-256: 02dd989b875817fccbdc58f067e826628db4fe6b84c4e2bb4250b4f7906e86da

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