Malicious PDF — malware analysis report

Static analysis result for SHA-256 a172e0f7244fc11e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-20 16:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86b1cbcf0d1e3a076ce35bf1014525ff SHA-1: 935f94c337847d1dca52cdf2755d5576c52bd299 SHA-256: a172e0f7244fc11e67ae3ba593f9acadeb610ff29c01794084dcd9b5c12179cf
126 Risk Score

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://ponafet.ru/wix?keyword=8+ball+pool+hack+generator+no+verification PDF link annotation
    • http://alexandreablog.com/segarokebanenoderumexanartbq09.pdfIn PDF document text
    • http://baykamif.space/center_form_vertically3dhzi.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/tipos_de_comunicacion_celular_y_sus_caracteristicas.pdfIn PDF document text
    • http://bristol-yalta.run/mississippi_burning_questions_and_answersy915m.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/8ihjfib/31954270963.pdfIn PDF document text
    • http://pigetubivefenux.22web.org/neumonia_pediatria_tratamiento.pdfIn PDF document text
    • http://boevoenlp.com/bein_sport_guidev4090.pdfIn PDF document text
    • https://cdn.sqhk.co/fipudiroj/jdjfijA/xiwibiduzadufojananezozus.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/lureduremopebofetoba.pdfIn PDF document text
    • http://tasuzafu.22web.org/glynn_county_inmate_population_report.pdfIn PDF document text
    • http://rixanemusijod.mywebcommunity.org/bournemouth_street_map.pdfIn PDF document text
    • http://ewwe.space/28627055343oao05.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/ijjm2Z9/the_green_glass_door_answer.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/sosoj.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/what_is_quantum_mechanics_all_about.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafalibowadavuz.rf.gd/how_to_flip_tires_exercise.pdfIn PDF document text
    • http://tosebimujuted.epizy.com/90012120952.pdfIn PDF document text
    • http://tixepedom.epizy.com/bezzera_unica_manual.pdfIn PDF document text
    • http://mipolerabafobe.epizy.com/sokonajumabeboj.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_much_is_a_box_of_romeo_and_juliet_cigars.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_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 5460 bytes
SHA-256: 616af8078c7457597c6c88a8216f49388a9b10e5091195ed38462f39b2831c03
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 11252 bytes
SHA-256: 7a9612e264aa08d07289c1fe7990edaa2471ca6554a501de4a2d1a7b27b7ad3a

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