Malicious PDF — malware analysis report

Static analysis result for SHA-256 14852ded1e37ea76…

MALICIOUS

PDF

73.4 KB Created: 2021-04-03 16:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b14c6ca61a7a749ce7fdb989e0c6d78a SHA-1: 0d55695707f23ebc2aebe282d06b6c6427afff28 SHA-256: 14852ded1e37ea765f810c64b5544960f1c47df8272cd19967010eaad336165b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The file's structure and the presence of embedded links suggest it is designed to lure users to a link farm, likely for phishing or to serve further malicious content. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://dafemum.ru/award?keyword=bes+516+113+s4+c+pdf In PDF document text
    • https://cdn.sqhk.co/jaziwuke/jiaMaws/srimad_bhagavatam_moolam_malayalam.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/pivagerijekusasuvupul.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/what_is_a_single_member_llc_vs_llc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_6062d796387d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_60013f8539aa0.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzevunoxina/hFidP6N/bittorrent_bollywood_movies_free_2018.pdfIn PDF document text
    • http://sakaxek.mygamesonline.org/zodogabepepinub.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/geaUdjh/12215224551.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/bejaresovubagikaxaxuwegod.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/gjcq9jb/67305005928.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/xoxulixuvez.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/hho7FnD/reversi_vs_online_multiplayer_othello_board_game.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/bloqueo_auriculoventricular_de_segundo_grado.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/bulgakov_mester_s_margarita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fakuguvil/ansys_fluent_cfd_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c7c288-f89a-4fbd-88c1-e95a9290efd6/zobusiruluvejurijuluvi.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/the_serpents_shadow_chapter_2_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/polaroid_is048_16_mp_waterproof_digital_camera.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/38648697542.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/2643172265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71adbd65-f6fd-4ee0-8b55-5f3d1b96db7a/dijuzoxewovowujubawo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 4888 bytes
SHA-256: 9dee23f52898b9bb88486937e0ced8b4d7df56fda260d22ca7ab5f568bec0248
font_01_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 11188 bytes
SHA-256: 7c5ee9ec748786b4985c482be6aa08a95d1ba2bd2c0dbb39f8bd95909876e7e9
font_02_sfnt_off00010a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333