Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c090908803ea26…

MALICIOUS

PDF

69.6 KB Created: 2021-03-10 01:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dc3cc7fbe4dcc392a1ebc965c6621a0b SHA-1: 2116697c7554c233360aad466d5c977e29dc0a70 SHA-256: b8c090908803ea2653114482d4e26fdf66a3823103235da9e1cc7c2fc515f451
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and the presence of suspicious URLs like 'http://characduwe.space/xutedukerufahkp9x.pdf' suggest malicious intent, possibly to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4770

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 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.
  • 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://dugedepap.ru/aws?utm_term=what+are+the+elements+of+writing+an+introduction PDF link annotation
    • http://characduwe.space/xutedukerufahkp9x.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/djajgjc/coin_master_clone_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/g6vCEoZ/joomla_bootstrap_4_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/cYjdhiw/parkour_definition_webster_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/4XiblZS/hearthstone_meta_report_august_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/gblheeC/world_war_1_map_of_europe_1914.pdfIn PDF document text
    • http://normaa-id.com/competitor_analysis_table_templatejatl7.pdfIn PDF document text
    • http://wisitens.online/mietvertrag_fr_nicht_preisgebundenen_wohnraumg9xux.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/if6uhfr/pressure_washer_replacement_pump_canada.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_1a96d4bc116547fcadc8ef891c996d93.pdf?index=trueIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_cbc85823c7f541d09f2f76143bcdfb9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/long_vowel_sounds_worksheets.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_cc0a52b56d40485ab17056e9ff3bf023.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_082af4c664f34007a04ab5247d41c016.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/69122756520.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_93b4241f9cd3413a9261711ee0e71227.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupijila/ap_chemistry_cliff_notes.pdfIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_6492cb1fd5c542edb5c523d2ec409000.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_1659ad53f20341fa8e30664e6f9f94e5.pdf?index=trueIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_1bfd027d30e042bd9f6449c25a8299eb.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_3c81629be6bf49cda38692df198371ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tudawufed/kuxobuweguzitawun.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/semexax.pdfIn PDF document text

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