Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd586671c504243…

MALICIOUS

PDF

80.6 KB Created: 2021-05-14 11:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 896f0a73dcf65c72dc0c6df3f846917e SHA-1: 94014cf86e8242a19adbba4cf9c65e595ee51285 SHA-256: 1fd586671c504243ef21738765c339411b1aff94dff28d552029dde978bd07a2
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 high likelihood of malicious intent. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=why+does+my+led+light+keep+flashing PDF link annotation
    • https://cdn.sqhk.co/pawekenu/mvRggeY/neet_challenger_aakash_download_for_pc.pdfIn PDF document text
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/1a7b7fcb0.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/pubirogagixutobiti.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/how_to_drain_swamp_cooler_for_winter.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/zhbEgi8/22963713294.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/d336f80.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/year_2_addition_and_subtraction_word_problems.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/pdf_file_editor_application.pdfIn PDF document text
    • http://papawugamajube.mygamesonline.org/nululavelodofosuzazajoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/bhgOnYt/tower_defence_fantasy_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/GwgnLgf/47733452889.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/36429202762.pdfIn PDF document text
    • https://sapefesoj.weebly.com/uploads/1/3/1/4/131453354/kuxajenuwegige-weruzuxagadaku.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/gdLidqv/gisurokovozoravobexufina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/public_relations_officer_duties.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/vawarorunuwan.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/gotid.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/ap_biology_textbook_campbell_11th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/63189454729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277aac6c-66c1-489b-b3b0-1d081c686f56/west_marine_safety_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3fd403-c985-4c3e-9f75-7d643bcbe34b/lisokavidibe.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/jiwogenusuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f605fa-43a0-45e4-bb95-86060293586f/xategazudegazifuguwutepo.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/morgan_chesky_nbc_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/chirkunda_weather_report.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_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 5536 bytes
SHA-256: 0012d814b90b9e6058639343743b76f0754d983b3c41912f72a6ab710b9c72b1
font_01_sfnt_off00010ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF3 10740 bytes
SHA-256: 7b4a971b72b1d67d5c4d4e1b88246a99985aea9b7a991e486053db7872b898cc

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