Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e753b5bec28eeff…

MALICIOUS

PDF

78.6 KB Created: 2021-03-29 15:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d6e3f397906aa1c289c9398583e15e8d SHA-1: 5ad68690009b13979ab039d50bafec0a180e75e5 SHA-256: 0e753b5bec28eefffceaf661f52d01fe5cdcfbd63a8cfb1336844a35cb75c7d3
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a domain associated with phishing or malware distribution. The PDF structure and embedded content suggest it is designed to trick users into visiting these external resources, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/award?keyword=deleuze+le+bergsonisme+pdf PDF link annotation
    • http://zugasanuko.getenjoyment.net/how_to_change_waterpik_battery.pdfIn PDF document text
    • http://theharaka.online/how_to_figure_out_mixing_ratiosl8pw1.pdfIn PDF document text
    • http://nnorm-id.com/bolizujezoght67l.pdfIn PDF document text
    • http://christinaanddavid2019.com/medical_surgical_nursing_9th_edition_ignatavicius_apa3qmbt.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/99417531438.pdfIn PDF document text
    • http://whalesqpa.fun/world_history_chapter_13_test_quizletodcf1.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/holy_quran_bangla_quran_sharif_in_bangla_translation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea652d41-8070-4020-bb55-6e8e6a111403/how_to_praise_poetry_in_urdu.pdfIn PDF document text
    • http://ruguweronum.rf.gd/kati_vagyok_alkoholista.pdfIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_6f88f1ff8a93485b84297b980678a4e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/jelewe.pdfIn PDF document text
    • http://folamogugomiw.rf.gd/japanese_candlesticks_patterns.pdfIn PDF document text
    • http://gufusogatodogej.rf.gd/acting_the_first_six_lessons_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a6a1ba-1a29-49cd-948f-7a3932ba365e/peace_like_a_river_book_quotes.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/business_feasibility_report.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/john_deere_js30_carburetor_removal.pdfIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_32d78b9ee2664ebfbf627782f5c53e52.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_71f7d1a9fb644355b6f1c7ea0f51bfa9.pdf?index=trueIn PDF document text
    • http://kubagaxupusu.epizy.com/ampli_vox_ac15cc1x.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/adguard_premium_cracked_apk.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_76f14a94dcae415e95581d438eff400c.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_9a8562f536094c1a8fa401c0c7b15be5.pdf?index=trueIn PDF document text
    • http://danijikuguwidak.rf.gd/aflatoksin_nedir.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_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 5340 bytes
SHA-256: ca321a5615de03801f6b98efe614ab43b94e40488a80a1e02908843d0ebc835a
font_01_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 13100 bytes
SHA-256: 2093ab1fd2d672955855b493bb2edc493b3f0b56bcad5036d24b72d4cb6c3604

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