Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeef7c83139f7f53…

MALICIOUS

PDF

94.5 KB Created: 2020-11-20 12:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f8b5be8a27df0e8637635d91969d8609 SHA-1: 1ffdddec4d2c70af8b441205f571fff037159911 SHA-256: aeef7c83139f7f536a19cbf3436995dd7f8269af2f386ad8e4f38cb32c33c9ac
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/strik?utm_term=pokemon+fuligin+walkthrough+text PDF link annotation
    • https://taponoranasigem.weebly.com/uploads/1/3/4/6/134643922/cbe40.pdfIn PDF document text
    • https://daviwoza.weebly.com/uploads/1/3/4/6/134670821/jemisizele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f88d0eb0ea81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_5fa4efb92cf29.pdfIn PDF document text
    • https://mibelilav.weebly.com/uploads/1/3/4/7/134747519/ripulupuputo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/871cfd21-3437-4dd1-a376-6e7127ada4b3/ruby_red_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2ef12c-eac9-4f97-8141-b2598c5b3f12/87732761328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb30d5a9-9abd-444b-a512-806348d08430/95858255696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f68c6d-b8cf-436f-a040-3b8d060e154d/141946636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5bb11de-57a0-4c45-b58a-f8e0ca714dfe/lusikunixewewivoletiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f821a5-14db-4779-9d48-51a9411d96b7/vujukowemipizatavitixizu.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_off0001324f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324F 5228 bytes
SHA-256: 05363ede5d89a564c4f1a77815c7d19817f3edc4ec93aaf99eefb5e61d0bb7aa
font_01_sfnt_off0001440c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440C 12508 bytes
SHA-256: c0be5e259849a13819ae4c025bd95ac63d5f81c567e5359ed85d628124860b86

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