Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da5260f72134b90…

MALICIOUS

PDF

66.6 KB Created: 2021-03-30 15:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7783024f1e65754019dc42c89207a0d5 SHA-1: c6fd293d8447c2c06775ec14c1d2b0e60234ceb4 SHA-256: 5da5260f72134b9096fd76cc52eb6a504bb0aa844cc5e6d3f436a1555f5fbf92
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9751

Heuristics 5

  • 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 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://fokemale.ru/aws?utm_term=economics+of+money+banking+and+financial+markets+12th+edition+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_0120d1007d71474fa797e123e38c7b50.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_6967d98caf13422d96f16ff06f1c7a5b.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_f05396b0cbf84a939332ef13482c6259.pdf?index=trueIn PDF document text
    • https://d6477b75-8e4d-4453-8bbc-a86a6009e57c.filesusr.com/ugd/261d41_c90aace6edda4380866733ed22e378c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac22e2f9-47ea-4f34-b0bf-bb774244d1d2/zuvobipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0167c2-f299-4706-bbe7-dc791f6acc3e/what_kind_of_charging_cord_for_kindle.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/black_and_decker_single_serve_coffee_maker_walmart.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_409579ef04ea4238b903a3ccbf0ae923.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_5a3b040430e641e3be82901d1a891cd9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedowedi/dragon_ball_android_games_list.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_4a996695e0b9481b9cff903ec602c875.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_f46c95ac2b0246229f95f7e404ae8070.pdf?index=trueIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_b6d35f6f9f58449da3271f8c58d42932.pdf?index=trueIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_615dc869341543fc9d307d29552a3853.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fopalew/drawing_book.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/hannah_arendt_quotes_on_education.pdfIn PDF document text
    • https://ff999131-262c-4f46-aa1e-84c50d3d9e43.filesusr.com/ugd/a474dd_2c0f84c1cb70481da0a7025acf5e59b2.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_66eddaa20db64669824a491c0d33531b.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 6016 bytes
SHA-256: 3ca729423b3ec6eeba98888955ba0537273c7fcd4f776352b538dd54012b9c43

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