Malicious PDF — malware analysis report

Static analysis result for SHA-256 e697fef1dfb003c0…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 08:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0acede92608e974e6c7a4aa75bc40b3 SHA-1: aa84c0791df248148284761848cb57245670848e SHA-256: e697fef1dfb003c0acfe94c21b442f315c3c5ea6b2f4c96bddbc32d565a5c471
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains multiple external URLs, some of which are hosted on disposable domains, suggesting a link farm or phishing infrastructure. The presence of a 'download button' heuristic further supports a lure-based attack pattern. The primary goal appears to be directing the user to download a malicious payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://dafemum.ru/wix?keyword=analytic+geometry+worksheets+with+answers+grade+10
    • https://cdn.sqhk.co/bupabumo/gcjeIAA/7685974642.pdf
    • https://gidibaxatum.weebly.com/uploads/1/3/4/8/134889182/korimibov_wokudotupufa_wizige.pdf
    • https://vojidejera.weebly.com/uploads/1/3/2/6/132695434/zipelap_loduwifefaz.pdf
    • http://gixodugesu.medianewsonline.com/wetaripinowute.pdf
    • https://fevujuwevu.weebly.com/uploads/1/3/0/8/130813851/mutofujuf.pdf
    • https://cdn.sqhk.co/pabefidinaz/hhhehb2/please_don_t_cut_the_grass_in_spanish.pdf
    • http://jugepawe.medianewsonline.com/codex_seraphinianus.pdf
    • https://novunafa.weebly.com/uploads/1/3/1/3/131379228/futasolapewena.pdf
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/wiwamexumuka.pdf
    • https://cdn.sqhk.co/bubiwalifeda/AaJhfjf/string_around_waist_weight_loss.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vejegaba.atwebpages.com/orbit_4_station_irrigation_controller_bunnings.pdf
    • http://ronagipesi.rf.gd/solutions_pre-_intermediate_class_audio_cds.pdf
    • https://uploads.strikinglycdn.com/files/e188206a-8832-4b13-b7e5-849f806bdd5b/sonobugesowefovan.pdf
    • http://belajuba.epizy.com/tavelexerezujozemivofunes.pdf
    • https://uploads.strikinglycdn.com/files/2a18c3c4-3242-4dd6-a727-c9b62cffc93f/wirupetitumevi.pdf
    • https://uploads.strikinglycdn.com/files/82180dd6-3091-4031-9396-df8f479f5561/lexmark_prospect_pro205_reset_ink_levels.pdf
    • http://mevuxuru.atwebpages.com/1679977379.pdf
    • http://golujaxi.epizy.com/zitilekexopepolatilaten.pdf
    • http://pokitudid.epizy.com/2277331720.pdf
    • http://pupovedifa.rf.gd/76799155206.pdf
    • https://uploads.strikinglycdn.com/files/792d4a80-c134-4101-9643-bcb262ccaa18/26228202882.pdf
    • http://nevozabewovezo.epizy.com/beauty_and_the_beast_piano_sheet_music_easy.pdf
    • https://uploads.strikinglycdn.com/files/2d91ed3c-ea70-4b58-a0d4-4ebe0c7e6c99/20451406630.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bd.bin
467aa9b603a7f3d7a1a9e3986f79ff24f9972488e5ed358f012d0b56775b00c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 5796 bytes
font_01_sfnt_off0000fd68.bin
326f355aef1dee0d222a2ce96d7944168a59fe63456f3e0223cfa6d3ec41efbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 10804 bytes

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