Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2113285eed0d189…

MALICIOUS

PDF

72.6 KB Created: 2020-11-27 22:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e1179cee555d142febb4b86d94f7c6a8 SHA-1: b44b70ae0ebc6bac30952a08ba1c0dc1ed016e8e SHA-256: e2113285eed0d189134e2df439cd7dc08bb0145d3d8b9b7e23f23ca93a1d9d53
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, particularly the one to 'gettraff.ru', are indicative of phishing or malware distribution attempts. The ML classifier and ClamAV also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=braintree+public+schools+school+committee+meeting In PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/depuraguvarukug_sitivinagiwun.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/sibenuvokiwuz/online_basketball_scoreboard_free_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f940c31f-5575-4c28-b56d-283bb1341d7c/el_esclavo_libro_completo_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec54578-8432-47a9-953b-8430b970e084/97711871622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d3c117-07fc-42d2-bb2c-9bb918f2ddb3/19218248940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3a7514-5896-4b3d-8b1e-04c179db65dc/schaums_outline_of_calculus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bc5e63-3b65-441d-a5af-efda96e81fad/rapid_fat_loss_handbook_free_downloa.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/mawakojudokuna.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/beethoven_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/super_smash_bros_melee_character_unlock_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/breadwinner_chapters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c09f7b-1bcd-4f6f-abfe-1f12d1457538/how_can_i_view_private_instagram_accounts.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/steam_boiler_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d4b32c-acba-42b7-a5a0-47a820817efa/womarademavow.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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 5536 bytes
SHA-256: b4702aee7cf3649283bd2a18ba5377559715c129ae29737ada1cada718c4146c
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 10884 bytes
SHA-256: 5f09df839d5b3ebbb2b605c541cbe741f0c20ad8854b620b7ce8a555bc62c941

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