Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d48f4a59db4122…

MALICIOUS

PDF

75.7 KB Created: 2021-02-27 09:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3cbeadb1241977d53b73daf6fa53c223 SHA-1: 90b3b4008e70c889727900053b682141131d1a02 SHA-256: c2d48f4a59db4122ba5e09733661c40aa6c00d810f2990757f845b7368ac694d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/aws?utm_term=coso+internal+control+framework+2018+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495040/normal_601f994333c08.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/flight_of_the_bumblebee_sheet_music_clarinet.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/cual_es_el_sistema_inmunolgico_del_ser_humano.pdfIn PDF document text
    • http://reactivascotia2020.com/farm_frenzy_inc_apkqa3xx.pdfIn PDF document text
    • http://byt-upak.ru/367344086541d58m.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/Lhj0eja/93519898864.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/supupalurejovefirezudifolv1cp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5ff944d946bd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490725/normal_5fc5ad11f1309.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/gg1gfhe/dinimafadixuridurivi.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/61955820460.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/gU6Cc57/orange_slice_candy_pound_cake.pdfIn PDF document text
    • http://fosupaxutipiz.iblogger.org/how_to_install_echo_dot_2nd_generation.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/h6Oibhj/10710015769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bavuveba.epizy.com/11106819560.pdfIn PDF document text
    • http://mivoxonewume.rf.gd/rutidasuwigodusex.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/moon_river_pizza_number.pdfIn PDF document text
    • http://retexibew.rf.gd/oster_microwave_oven_walmart.pdfIn PDF document text
    • http://sifuzetijo.rf.gd/31489136137.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 5788 bytes
SHA-256: f95be6e31a17a7af39ca197caee6d3e20d1bbe332464cdb889503c6c3cecb94f
font_01_sfnt_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 10292 bytes
SHA-256: 60c6fa6cf5dbc8d77d6d59d458750f8c343578f83093f83c78da85573cc42f4e
font_02_sfnt_off00011398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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