Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d17c07f2762d3d…

MALICIOUS

PDF

67.6 KB Created: 2021-03-11 15:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6cfac02db98a2be730d0ccad20d0f3c7 SHA-1: 3cdc6c7c309c3baa4fc7afa5eaeb52f6d373a09c SHA-256: 72d17c07f2762d3d3bec1e21c703d519577a20c2995105a71f2fee7a6b01208c
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains numerous external URIs, including one pointing to 'jumiwimov.ru', suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate the document's primary purpose is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=mills+eagles+earn+to+die+2012+part+2 PDF link annotation
    • https://cdn.sqhk.co/lilaxikixo/XTjglgi/marvel_realm_of_champions_download.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/watafofajidegibizowuxukob.pdfIn PDF document text
    • http://gekenig.mywebcommunity.org/44797523598.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/research_methods_in_psychology_w_bind-in_access.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/12050710469.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/abRchhS/tejero.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/cardfight_vanguard_rules.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/salems_lot_book_club_edition.pdfIn PDF document text
    • http://zajegipu.22web.org/adventure_time_card_wars_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/igOgf86/wholee_online_shopping_store.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupesujutiwu.myartsonline.com/3356776801.pdfIn PDF document text
    • http://gagugitebuf.atwebpages.com/statistical_analysis_in_r.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/nupujozi.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/data_science_career_opportunities.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_84f104e6484743858f180d1cfb1da1b0.pdf?index=trueIn PDF document text
    • http://nixevafuzija.epizy.com/46191124613.pdfIn PDF document text
    • http://lewemezitena.rf.gd/a_b_c_d_child_video.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_dd50d5db1c7748b8b6281d80d894198b.pdf?index=trueIn PDF document text
    • http://dufobirufo.atwebpages.com/lepurujivukojukitivut.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/contoh_surat_lamaran_kerja_guru.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_off0000cb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB19 5460 bytes
SHA-256: ff2aef8f4d2a590732b0c17bbf6c0c3ca362d59210d45b5afef2b2a3205af860
font_01_sfnt_off0000ddc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 10336 bytes
SHA-256: 8b10d626f325a78f4c443c1a939d32392b2eba5bc63c3f6cd3a8d590ef151b6c

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