Malicious PDF — malware analysis report

Static analysis result for SHA-256 398d0de16f9b512c…

MALICIOUS

PDF

69.4 KB Created: 2021-02-18 23:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 98508092163b60e7d5768da116f0e3cb SHA-1: 2523082fc72a48a46d14dd1c7c6e4b933c78fe94 SHA-256: 398d0de16f9b512ce7ef081321a6570abfe2edd9297df71d106e09b0b15c6e2a
126 Risk Score

Malware Insights

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

The PDF document contains a prominent link related to bypassing iPhone activation, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a malicious document designed to redirect users to a potentially harmful site.

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://bologen.ru/strik?utm_term=how+to+bypass+iphone+activation+without+apple+id PDF link annotation
    • https://cdn.sqhk.co/ragonujip/cCtjexr/clash_of_clans_ultimate_gems_and_coins_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/4tiamij/kumonidaduwimogebubud.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/jhjijaK/the_startup_game.pdfIn PDF document text
    • http://konobemozitu.iblogger.org/dusk_till_dawn_piano_sheet_musescore.pdfIn PDF document text
    • http://budozezofezuje.iblogger.org/gejaxefusamemilozukedod.pdfIn PDF document text
    • http://pazobano.iblogger.org/waxukekijodurebu.pdfIn PDF document text
    • http://zipogagu.iblogger.org/dna_extraction_lab_report_discussion.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/sasufufa/solved_numericals_on_amplitude_modulation.pdfIn PDF document text
    • http://vusomafolu.rf.gd/averta_regular_font_free.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/cheat_sheet_for_autocad_commands.pdfIn PDF document text
    • http://logovejewuwofe.rf.gd/95367299447.pdfIn PDF document text
    • http://zamigunuzowa.epizy.com/audible_in_itunes_importieren.pdfIn PDF document text
    • http://tojegazanet.rf.gd/81549001957.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/diwexi.pdfIn PDF document text
    • http://jibitolokadidus.rf.gd/64670685299.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/71339056778.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/budget_template_free_mac.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_off0000d0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 5420 bytes
SHA-256: ec4647828a68a423f225598b9a3e4bea77870d1ca6011eb6aa9663c89bc230d8
font_01_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 10948 bytes
SHA-256: 8b1a6781112877301981d5101314c494f7b8b949fef81288cf2447b3e125d4f9

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