Malicious PDF — malware analysis report

Static analysis result for SHA-256 24487e3dda5f9c5f…

MALICIOUS

PDF

74.6 KB Created: 2021-03-02 04:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3b368da69cf7ef4d622a1fc1c69256d SHA-1: 49a015c3ebc3a24dc0e7c87275a956af5354538b SHA-256: 24487e3dda5f9c5f7f4a4a7f526cd2c0340d01eaf5e703e8ddebd26e48a772b3
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to a popular book, likely used as a lure to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=hunger+games+mockingjay+part+2+book+pdf PDF link annotation
    • https://cdn.sqhk.co/kutajanode/cN4smi4/xuwuzenilawuralurev.pdfIn PDF document text
    • http://rapejavom.22web.org/kotiwozevosamewinamuxitar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_6011bea121beb.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/xjeylid/96764804740.pdfIn PDF document text
    • http://nuraramibifowom.22web.org/gupawonidekosokuzemaz.pdfIn PDF document text
    • http://razagewodun.iblogger.org/cattle_production_in_ghana.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/hp_w2207h_resolution.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/hc3hbif/63603639916.pdfIn PDF document text
    • http://najefot.22web.org/android_review_smartphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesixogid.rf.gd/pathfinder_2e_gamemastery_guide_review.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/lonilarivivarubaboje.pdfIn PDF document text
    • http://lesofowan.rf.gd/sistem_informasi_akuntansi_manajemen_menurut_para_ahli.pdfIn PDF document text
    • http://bexinoj.epizy.com/spider-_man_spider-_man_game.pdfIn PDF document text
    • http://ledukuxadom.epizy.com/beyblade_all_games_gba.pdfIn PDF document text
    • http://rolodumom.epizy.com/create_dashboard_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/code_breaker_puzzles_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/ashampoo_snap_7_full_crack.pdfIn PDF document text
    • http://roterelerunexit.rf.gd/how_to_prepare_phosphate_buffer_7.2.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_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 5920 bytes
SHA-256: 6e09e95dbb2a132d4a207493c16cb8189f286674487dd991d2fca7dfd7d0db38
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 10216 bytes
SHA-256: 7a6c72e5a3e8a786f8553ef53f7c6661eeffc4e2fb2703aaa723e1c2f035bf07

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