Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0e8ec936b086f6…

MALICIOUS

PDF

73.7 KB Created: 2021-01-25 13:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b782e1a07576e363b6c674ee9686489f SHA-1: c5dbeb9ae37eb875891e0f2df30bf969179da3aa SHA-256: fe0e8ec936b086f67e0937b412728da08da22d22083943b0146a05d194638f70
284 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, including detections for malicious redirector links and a link farm. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of a 'Password-protected archive handoff' heuristic indicates a common tactic to bypass security scanners by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=kaththi+theme+song+ringtone In PDF document text
    • https://cdn.sqhk.co/bogulevim/58A7DHV/46521148175.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/fXQZjeF/89394894814.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/9812f60.pdfIn PDF document text
    • http://gejopuzebizovuk.iblogger.org/all_odia_album_song_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_5feb339ecc618.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/r1lbhd4/83818387198.pdfIn PDF document text
    • http://mekatososa.iblogger.org/33423296586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380858/normal_5fedd28a84193.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/odgGUhc/free_music_songs_for_videos_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/aifV7ic/30636063998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498702/normal_6000838c2624c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikisomu.epizy.com/annexure_6_form_rrb.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/beginners_guide_to_bass_fishing.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/chalte_chalte_pakeezah_video_song.pdfIn PDF document text
    • http://ravuxigud.epizy.com/guided_tour_churchill_war_rooms.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/customary_units_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/mantras_budismo_tibetano.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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 5036 bytes
SHA-256: c34d3efa0c539ce38bcb8f5190e60aec928787368e8f6101265a55058cbd27fb
font_01_sfnt_off0000f5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F8 10560 bytes
SHA-256: b189ca539ee5289a96fc686791a320a32a559e3aa645ed1d7d5991ef84ebef95