Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ba98f5b0057b7…

MALICIOUS

PDF

75.1 KB Created: 2021-04-08 01:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 75984fe688106715db8bcc9acc7e327c SHA-1: d9b8a39d5f74cb4b0478ef52d0fd42ae48a62a6e SHA-256: e65ba98f5b0057b79db4592da9abaf1ec0a3e8029f1ebbd8e8e4f5703b155b01
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing and trojan threat. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/123?utm_term=java+8+64+bit+jdk PDF link annotation
    • http://godotobekof.scienceontheweb.net/17195279447.pdfIn PDF document text
    • http://bapikiboz.iblogger.org/regipazupujexuluselufezu.pdfIn PDF document text
    • http://kinorio5.xyz/20741394831g26qv.pdfIn PDF document text
    • http://zopevaxawoxe.22web.org/how_to_magnetize_an_electric_generator_field.pdfIn PDF document text
    • http://samozanyat.info/tedoxanimipenoje44h7s.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/9367580.pdfIn PDF document text
    • http://kilekapalovuzo.getenjoyment.net/84688478787.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/1217151907.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/how_to_broil_in_a_kenmore_oven.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/rofusupep.pdfIn PDF document text
    • https://javesobasi.weebly.com/uploads/1/3/4/7/134736097/8564836.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/pominininuv.pdfIn PDF document text
    • http://lokotahas.ru/libro_azul_nissan_tiida_2015mj5ht.pdfIn PDF document text
    • http://dajexori.mypressonline.com/what_is_the_history_of_the_sweet_potatoes.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/lilunalilonepuvazut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://votarudiwutap.epizy.com/muscle_groups_anatomy.pdfIn PDF document text
    • http://tudutov.rf.gd/rugisapujekefitupemetu.pdfIn PDF document text
    • http://penisofitomi.epizy.com/hungarian_rhapsody_no._2_flute_sheet_music.pdfIn PDF document text
    • http://dekifovep.epizy.com/chita_chola_see_bedardi_video.pdfIn PDF document text
    • http://lexezov.rf.gd/72041913416.pdfIn PDF document text
    • http://zepaxawom.rf.gd/iams_large_breed_puppy_feeding_guidelines.pdfIn PDF document text
    • http://vemusimovoxodan.rf.gd/32107318384.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/gomoji.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_off0000e6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D9 5276 bytes
SHA-256: 7b7ae7f7790ce966624badeaaae1da4239f5f8c0fab85012682b4e3444cda9cf
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 10756 bytes
SHA-256: 0f1cffeba26ed774a948ecc5b848be6858585a2ab05b06d8c982f5614490a6b1

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