Malicious PDF — malware analysis report

Static analysis result for SHA-256 46895b592dd3663b…

MALICIOUS

PDF

87.4 KB Created: 2021-04-05 02:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8140e26a45006c844e0fe25de676c60 SHA-1: de0ba06497b45fa6b20bba6b59418ef7a5176527 SHA-256: 46895b592dd3663b06d6cc36cfad7f0cedc3b5bc2f8d54d510b17983d1d2ca89
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/123?utm_term=information+memorandum+template+m%2526+a
    • http://garobunatuxovi.scienceontheweb.net/gatewidisovowev.pdf
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/wafoduzarigul.pdf
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/1431581.pdf
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/lojopeluf.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://5coupon.info/comprar_entradas_para_el_circo_de_la_chola_chabucaygg2f.pdf
    • https://wevofuru.weebly.com/uploads/1/3/4/6/134670173/mupefirisatowok.pdf
    • http://natosabi.mygamesonline.org/formato_de_historia_clinica_psicologica_para_nios.pdf
    • https://wipigoxexidon.weebly.com/uploads/1/3/2/6/132682030/gepulufuse.pdf
    • http://comp-arenda.site/21008903426sywtf.pdf
    • http://gavediteriremuv.medianewsonline.com/arduino_uno_r3_smd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_e6f2ca1cb1a64effb64dbc3882ba4156.pdf?index=true
    • https://s3.amazonaws.com/gozifep/zekazazirob.pdf
    • https://s3.amazonaws.com/wifukedot/compatibility_report_natal_chart.pdf
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_0270c50647f949e29f4ae11675b3d80f.pdf?index=true
    • http://fabevax.myartsonline.com/63051174724.pdf
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_3e76ccc444a34d18bd5f5074c28142a7.pdf?index=true
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_1df09b0c45764cb48b4dc9482c10a0cd.pdf?index=true
    • https://s3.amazonaws.com/xupizewuxere/lemofadoto.pdf
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_e5dbba13822e45c8b9d877bda5284488.pdf?index=true
    • https://s3.amazonaws.com/xepululejiwof/how_to_describe_my_pet_dog.pdf
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_dd98c1784edd460d8e391b89a67bfcbc.pdf?index=true
    • http://jujageritoxo.atwebpages.com/simple_present_past_and_future_tense_exercises.pdf
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_358b7432003549d6aa893ae0d303249d.pdf?index=true
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_b281ddfbf6784cf88f02197297bce19a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001177c.bin
9f517a84dfb034be9318856faea7aaa5f1b497670f756924bc6f910e1d5e1465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 4944 bytes
font_01_sfnt_off00012835.bin
33bcbbf9d4eae0fbb5299c05451b3ef407db8c6cc1b03697559574aee267975f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12835 11900 bytes

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