Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1dfd514dc36127…

MALICIOUS

PDF

68.4 KB Created: 2021-03-14 05:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4e568811867a3c0b2f7a8d153fb660a SHA-1: 8e3bf7fc337b08345440a62aa79c9b748dfeb3be SHA-256: 6b1dfd514dc361278ec0ab442703a1c63206da3ff833e3651deac833aec72eae
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM and PDF_URI heuristics. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites, possibly for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7003

Heuristics 4

  • 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
  • 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://druttle.ru/strik?utm_term=how+to+do+coconut+oil+pulling
    • https://jagozuru.weebly.com/uploads/1/3/4/3/134360529/taxawilaf_wireni_givise.pdf
    • https://cdn-cms.f-static.net/uploads/4408601/normal_601a3d4b887e3.pdf
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5fdad46bd75f6.pdf
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/94e80b29673.pdf
    • https://foretenam.weebly.com/uploads/1/3/4/7/134700633/1d79843c.pdf
    • https://cdn-cms.f-static.net/uploads/4450641/normal_602ab9de4b41c.pdf
    • https://zosonokabawim.weebly.com/uploads/1/3/4/3/134316026/3c1c1960f7d5c.pdf
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6015aa27433c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dorobukasawituw/valvular_heart_disease_guidelines_ppt.pdf
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_dc1885fe9b814cf6a2be7a892a55f7d2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff3f015d-5677-4b80-b28e-6975acb40780/new_criticism_example_movie.pdf
    • https://105d84dd-9b22-4355-af37-21382b2db671.filesusr.com/ugd/f4243a_a4952f6c39a943b981e5a113d504b992.pdf?index=true
    • https://uploads.strikinglycdn.com/files/39da608a-e734-4287-8cf5-b62a42d302a3/how_to_do_multiple_regression_in_statistics.pdf
    • https://s3.amazonaws.com/timeziso/wibufu.pdf
    • https://uploads.strikinglycdn.com/files/ea8bd194-4990-45d9-b618-3247875b6898/39934763289.pdf
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_0edc540d75064dffaf5137777340638c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58d1873e-307f-4f6c-8f64-9a048e983bfa/2004_dodge_ram_1500_hemi_oil_capacity.pdf
    • https://s3.amazonaws.com/pogolo/solar_system_word_search_puzzle.pdf
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_b95aad09603f4cd69816afff05095628.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4870c450-433c-4172-bafb-a8827591a4fb/19495584978.pdf
    • https://s3.amazonaws.com/gudukupir/kafamubikexinakitup.pdf
    • https://s3.amazonaws.com/dowadotiju/canon_eos_m50_manual_settings.pdf
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_06f7a7c2e79643d0b55fbb71a2d2a3ef.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f332.bin
90614e2e62d7cc415e0c855588581bb85d27cf22ccf4d122f7860b8539bb6a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF332 4812 bytes

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