Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb6f745ee95d8bc…

MALICIOUS

PDF

73.9 KB Created: 2021-02-22 21:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 22bed9421661dc4ba22fd9965da4fb2c SHA-1: 4078dcfdc86644c2607c27bd09229ed19f862c32 SHA-256: 6eb6f745ee95d8bc0eed81fbf659028b80494027298293a4a14a44990b247656
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/wb?keyword=understanding%20financial%20statements%2010th%20edition%20free%20download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450045/normal_5ff02f06db74d.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/tunolulo_kuluga_rixijebe_sosuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_5fe636b51dd55.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/6325024.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fe2ba6837f3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421039/normal_5ff339982d6e9.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/374d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_60313b4298634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366987/normal_5ffb66f1eca6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_600a22cf6cc99.pdfIn PDF document text
    • https://vetetomo.weebly.com/uploads/1/3/4/0/134000119/d8c8f3c2.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/5961701.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/2910527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_600b9c0f211ff.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/vedexajawo/46520147605.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/settimeout_asynctask_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/55038502330.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/vujuf.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_off0000df3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3E 5712 bytes
SHA-256: cc9332b834f9b753137a787b96e51de5aa7da118b3154faf0fd21a6e6c601765
font_01_sfnt_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 11080 bytes
SHA-256: 0f67b13367c622d7e0b7cbd475b18915af3bbcd22ec472bedc0e7bb43d32ca1f