Malicious PDF — malware analysis report

Static analysis result for SHA-256 c004bde3d672581d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 12:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b476ede2264eb8830911cfc18b05eb8 SHA-1: c2c0e50fa293e3bccbe484f53389716efaf1fc73 SHA-256: c004bde3d672581d2429cfa074ffbc41670131380986830fb37ab1d4cc130c37
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.8550

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://dafemum.ru/award?keyword=anemia+drepanoc%25C3%25ADtica+pdf PDF link annotation
    • http://sinoxaju.mygamesonline.org/secured_file.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/aprendizajes_clave_primaria_2020.pdfIn PDF document text
    • http://sitonuba.mypressonline.com/12074718310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6028f01f724f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5fef19febe1a8.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/basquetbol_historia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_602efc8739015.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/xurakipud.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/what_type_of_oil_do_you_use_in_a_briggs_and_stratton_engine.pdfIn PDF document text
    • http://jikalananigopun.iblogger.org/poetic_form_abababcc.pdfIn PDF document text
    • http://tuzotumefakorok.scienceontheweb.net/jidanumilu.pdfIn PDF document text
    • http://zugobopepoj.sportsontheweb.net/august_2020_printable_calendar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimotomalugeji.rf.gd/88917260712.pdfIn PDF document text
    • http://taberadajip.atwebpages.com/breakthrough_plus_1_download.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_1f1fc4a5ca424fdda7acdd534001a5da.pdf?index=trueIn PDF document text
    • http://bimixurelulufob.rf.gd/zadenabexawex.pdfIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_abee65b76556403e8c39fad28cb163ce.pdf?index=trueIn PDF document text
    • http://lizuratudesaxop.epizy.com/activator_c_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a281e6-c737-42b8-b09c-aa73caae08f3/dulipuparakulani.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/antipsychotic_drugs_mcq.pdfIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_268dcf06a1ca4e129267ab3d0c005a9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60d7c56-7ae6-4b18-aa16-15340da3e081/how_much_is_lauren_hashian_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714ed6a9-b21d-4cee-9060-882586859223/70266596680.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_b9ab76ce77194a198287b27a8b9a4d3e.pdf?index=trueIn PDF document text
    • http://gepafelixadu.onlinewebshop.net/13460786906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7becc9-9654-4fd3-97bc-b5570718fa5d/niful.pdfIn 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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 5136 bytes
SHA-256: 80c1e15b111a8a760af11e749b2a4915a3d85cd50259ccc5ae5b9b6f9aeedd6e
font_01_sfnt_off0001000d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 12884 bytes
SHA-256: a2f344d8d67da761f3328436d66e032741c78d055096d63597f640fb5c150a92

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