Malicious PDF — malware analysis report

Static analysis result for SHA-256 054dcb47a35c2acb…

MALICIOUS

PDF

88.7 KB Created: 2021-03-31 02:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 705b0c3acfa49e30739367ba0c3722dc SHA-1: ea39c068f35fe679f7d753c00744f4a7ddd1e6a9 SHA-256: 054dcb47a35c2acbb9e3d20e8a9200ced9a7a524ab09ec51451808cc3a4c7744
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to PlayStation 4 codes, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+use+a+10+digit+code+on+ps4 In PDF document text
    • http://paselon.getenjoyment.net/55990207973.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdfIn PDF document text
    • http://vadanunagirira.getenjoyment.net/method_statement_for_excavation_and_backfilling.pdfIn PDF document text
    • http://moneymaya.site/55920306728d0kzh.pdfIn PDF document text
    • http://zajilakofudo.scienceontheweb.net/badamujegojulatukodud.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/vabudarik.pdfIn PDF document text
    • http://katalog-siberian-force.online/panasonic_viera_65_inch_plasma_tv_manualhqg1c.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/61013356897.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/miwokozarisobonofu.pdfIn PDF document text
    • http://tetoxukipim.getenjoyment.net/mubaxupumuwalugaga.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/blue_eyes_technology_report.pdfIn PDF document text
    • http://uaportal.site/gubuvidujop5ta0r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujixus/reading_comprehension_worksheets_2nd_grade.pdfIn PDF document text
    • http://kotasogova.rf.gd/world_cup_excel_spreadsheet_2018_predictions.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/maximized_manhood_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/juvazalixulujixe.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/16205178183.pdfIn PDF document text
    • http://nararinakajufu.rf.gd/69546165325.pdfIn PDF document text
    • http://jokizexolej.epizy.com/62233143382.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/phases_of_biotransformation_reaction.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/wovateselifufalotatalomi.pdfIn PDF document text
    • http://texazufuvo.rf.gd/peripheral_arterial_occlusive_disease.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_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 5448 bytes
SHA-256: bfadb96dd3aaf0efdd57f93b7dca39d7ffb6e9749c0994a13fb6251f4fd7a898
font_01_sfnt_off00012ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF1 10812 bytes
SHA-256: 6e86fed26ffa6b56d91d197da788ee91493480ff6727996a64adbd5a2dace828

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