Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a36b0f88bef1e5…

MALICIOUS

PDF

162.0 KB Created: 2021-03-06 03:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9e979a21753f6ca053a724cb11f7633b SHA-1: 8873d79775cac1839a4c865ff871c5d2d21b4ba0 SHA-256: a0a36b0f88bef1e5105d2fe9d327c2ea5f934d1dd5057a112cbc91a0cb508f62
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with many pointing to disposable domains and exhibiting link farm characteristics. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/123?utm_term=what+age+is+the+little+prince+book+for PDF link annotation
    • http://iuts.space/play_sudoku_medium_leveln1wwq.pdfIn PDF document text
    • http://believes.space/3958634525c19vp.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/can_you_negotiate_lease_payoff.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/AijBFid/tts_gen_halilintar_family_pintare.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/d79jcnV/basic_entrepreneurial_skills_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/y7NjhXn/rezot.pdfIn PDF document text
    • http://makamar.tech/727798113106l61z.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/eiiPlha/4308163779.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/25112554203.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/tqjjjiy/95521546972.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/the_lightning_thief_chapter_10_questions.pdfIn PDF document text
    • http://optamorem.com/50cc_70cc_90cc_110cc_125cc_chinese_atv_service_repair_manualsv7rkv.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/secant_angles_worksheet_answers.pdfIn PDF document text
    • http://panijawukufo.iblogger.org/76413419044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movuzawizigevej.myartsonline.com/guitar_sheet_music_with_tabs.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/bibolutuv.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/63784595793.pdfIn PDF document text
    • http://natadomemorad.epizy.com/9028061236.pdfIn PDF document text
    • http://fukanabe.epizy.com/wadog.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F79 5496 bytes
SHA-256: e7eea1f0a5f2eb5aef51c29bd4e53b9f423c5e0aa5d074935493c9a52aae9f61
font_01_sfnt_off0002229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2229A 5492 bytes
SHA-256: f1e9177a67441ccf98a1284d15426f5d20759dc39c86f0c5939653baff990897
font_02_sfnt_off00023557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23557 15784 bytes
SHA-256: e8055b0490caaf87eb78dde6a721e17e3bc535e13ab3a89655d20daee3e5de28
font_03_sfnt_off0002643d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2643D 16232 bytes
SHA-256: 4098ebc279d9b414998621cc31b92695e1ab98cebbc1a71f254f071ba87d0cd6

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