Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ade6b73fee23b83…

MALICIOUS

PDF

80.3 KB Created: 2021-04-03 23:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2768bb8f93e9a98257f13189e1c1e80d SHA-1: c0177bf96370eb7118f90885ac9b6fa8e46c3233 SHA-256: 4ade6b73fee23b83d0686cebfc66d40895cc82c7859a03278bab6e4ed3346a8f
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 0.9993

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://resalured.ru/strik?utm_term=fallout+4+mods+pc+installation+guide PDF link annotation
    • http://mon-cmbretagne.com/99437447849gtaeu.pdfIn PDF document text
    • http://winoorama.space/53747487926c29i3.pdfIn PDF document text
    • http://tulimosigen.22web.org/xizarotedo.pdfIn PDF document text
    • http://tk-pobeda.site/fafilebukevunigatogolem8lo42.pdfIn PDF document text
    • http://copyrightshelpcenter.com/5102681462580nff.pdfIn PDF document text
    • http://vawafaxas.iblogger.org/muwolu.pdfIn PDF document text
    • http://all-gopro.com/4116398598jhsjb.pdfIn PDF document text
    • http://bisabej.iblogger.org/bellman_ford_algorithm_example_step_by_step.pdfIn PDF document text
    • http://wellwork.site/como_es_la_forma_de_comunicacion_de_las_aves_y_para_k_utilizan_el_sonido2qdzw.pdfIn PDF document text
    • http://frasqen.online/68150956716drbz4.pdfIn PDF document text
    • http://unlockdeals.shop/learn_english_speaking_online_india_freeed0jh.pdfIn PDF document text
    • http://eroganoficial.site/georgia_guidestones_reduce_populationp0qlk.pdfIn PDF document text
    • http://koteyarn.moscow/vokefamafiwuduqfgx.pdfIn PDF document text
    • http://eferevole.com/17010561736sig4f.pdfIn PDF document text
    • http://boxberry-24.cc/how_do_i_check_the_status_of_my_cdl_in_texasndrrm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b3ead8-1861-4b55-9042-6971e50c6c15/metamorphosis_franz_kafka_sparknotes.pdfIn PDF document text
    • http://maduxefolus.epizy.com/first_alert_p1210_manual.pdfIn PDF document text
    • http://datadeb.epizy.com/atex_directive_1999_92_ec.pdfIn PDF document text
    • http://gapevizatijaba.epizy.com/19058996484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558d6c5e-eae1-420f-b1bd-24c39f182804/69577970183.pdfIn PDF document text
    • http://bodumenijos.epizy.com/call_girl_voice_changer_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0b954a-f038-4498-bfce-48128c19b1f8/normal_anion_gap_acidosis_mnemonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81187baf-ae1b-4967-838b-d2eca7d809d8/15178234652.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_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 5340 bytes
SHA-256: f46677cf36d8a437bc9be8d7c2345a362731d5ebe24e265589df6b645dc21a0a
font_01_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 11232 bytes
SHA-256: b07c79442279aff2fc620208c7910016b6f74296da00a221fdd676ced67f3c72

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