Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1801754c0d2dd84…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 09:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a3f585faed3500f37bc6991032293f8e SHA-1: c9d38be92364ee1f01d0cc97f8408f80e453f90e SHA-256: e1801754c0d2dd84b351e9cd71b6c948e1be7557b1fecbf94d0391b768d9a358
126 Risk Score

Malware Insights

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

The PDF document is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, references 'Symphonie fantastique 5th movement analysis', likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=symphonie+fantastique+5th+movement+analysis PDF link annotation
    • https://cdn.sqhk.co/tofegejij/coQ1hhT/occupation_definition_occupational_therapy.pdfIn PDF document text
    • http://1yamal.space/calculus_one_and_several_variables_with_analytic_geometryq31hh.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/38289058785.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/how_much_does_a_bobcat_cost_per_hour.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/25658057535.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/story_of_one_piece_so_fardp3s8.pdfIn PDF document text
    • http://brosbass.com/approximations_and_estimations70o3r.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/aqhbgdT/adamantine_armor_5e_tools.pdfIn PDF document text
    • http://marketitaly.info/mikutaviwanikaayiff.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/prayer_rain_prayer_points.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/1lbhdsQ/billie_eilish_merch_bershka_dubai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_5fe77584e93b3.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/mkhcShh/hocus_pocus_spirit_jersey_2020_ebay.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/31884042876.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/open_office_editor.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/wejutilibomigerigunizug.pdfIn PDF document text
    • http://birjand.design/pupuzos8hic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomapagovujux.atwebpages.com/dgfc.basica.sep.gob.mx_aprendizajes_clave_curso_en_linea_2020.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/sirogonodijirefekum.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/ipod_touch_4th_generation_8gb_specifications.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/what_number_is_newsmax_on_dish_network.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_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 5560 bytes
SHA-256: a59b3bd108f8613b2a6eb076527933d9b03f40ba2d12c28487add5fde687028b
font_01_sfnt_off0000fa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 10228 bytes
SHA-256: 7dec1ded2f50f47aa6e070b6a735d95b37507a457757693b8f98821d61a5d39d

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