Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6c75b732985b30…

MALICIOUS

PDF

92.2 KB Created: 2021-04-03 10:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: af98ca523121b65f22939a56a8ecd73e SHA-1: b80528722a9859d0d66049c2537f5793fcdf5ba0 SHA-256: eb6c75b732985b3048a84fb8f139e1af246f382473847a258da44c1ff0ddeafd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary focus on directing users to external sites disguised as search results or document downloads. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://dugedepap.ru/award?keyword=4th+industrial+revolution+in+telugu+pdf PDF link annotation
    • http://sluzhba1.net/69519116881byakr.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/annual_general_meeting_minutes.pdfIn PDF document text
    • http://loveantravel.xyz/cancion_de_hielo_y_fuego_gigameshwhvcd.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/kghhfB8/plants_vs_zombies_heroes_mac_download.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/rasis.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/gfgh4Fx/carnival_games_wii_metacritic.pdfIn PDF document text
    • http://nesarose.sportsontheweb.net/28174265754.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/80355900718.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/universal_design_in_architecture.pdfIn PDF document text
    • http://kinoxca.xyz/sparknotes_the_tempest_act_1_scene_2_summaryery88.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/wunovisaxi.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/vokamenudemijolobigodise.pdfIn PDF document text
    • https://lipamonevarila.weebly.com/uploads/1/3/1/4/131453989/voloxinulozowexus.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/mti_little_mermaid_jr_script.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofideb.onlinewebshop.net/what_are_biological_factors.pdfIn PDF document text
    • http://kopolug.myartsonline.com/diario_de_una_motocicleta_pelicula_completa_espaol.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/ace_trauma_test.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_off00012917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12917 5356 bytes
SHA-256: d2262e5fc1a3619b4627e4b32d4ab712bbfc3c9e60748798a9c6305b6723a3cd
font_01_sfnt_off00013b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B52 12572 bytes
SHA-256: 58d9463259b3ea3672dc803fdd6f365ddf347700e027675971bbf5d42ecc500d

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