Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5ad4892705cfc6…

MALICIOUS

PDF

69.1 KB Created: 2021-03-20 22:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: db267e2d0de7e19a47e4f3b254e6945b SHA-1: 24d834bcaa34a7a1df0b6b527df2fa21b851ec55 SHA-256: 4e5ad4892705cfc6163c2d8a479be131a35b488ddb1cad9a5eac79ba1b66937d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the classification as a link farm designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jottigo.ru/aws?utm_term=how+to+jump+start+weight+loss+on+keto PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459625/normal_600e5a385a8d4.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/A9vicMp/learn_50_languages_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_600e2209ca0b1.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/Mzig4ig/swat_movie_cast.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/agile_software_project_management_methods.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/3mhb4iO/jowazakurajujar.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/5ogjfxs/smithsonian_channel_schedule_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/gGiimi0/boxuda.pdfIn PDF document text
    • https://cdn.sqhk.co/lezubenewago/ie5OibN/umc_zorgverzekering_ivf.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/miaUKDq/gold_rush_3d_game.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/13506186524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482854/normal_5fe064b290716.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jvhe0gh/tactics_ogre_battle_mechanics.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/zifhchf/summoners_war_early_game_gb10_team.pdfIn PDF document text
    • http://tagaporigowekis.mygamesonline.org/76845911215.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jovukanuwu.rf.gd/xigirujufamuti.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/gatov.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/another_word_for_bringing_back_memories.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/boss_ps-6_harmonist_pitch_shifter_pedal.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/taking_sides_clashing_views_on_psychological_issues_20th_edition_ebook.pdfIn PDF document text
    • http://wavexijazibivat.myartsonline.com/kjv_study_bible_download.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_off0000d257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 5424 bytes
SHA-256: 8684335394e8a1b2142545318bd511c7ae3b3ee7b08937ebe96d0cbfc9876005
font_01_sfnt_off0000e4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 10136 bytes
SHA-256: dd9e02e4a0ce8e4d0af34fbfc3e90d39a67f158fda0f9fca601d1d15579e9677

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