Malicious PDF — malware analysis report

Static analysis result for SHA-256 a757b88aa22a52ac…

MALICIOUS

PDF

68.3 KB Created: 2021-03-17 11:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 489d5cddd17955ed371f1679360df05c SHA-1: 94bbf1e368d3d177f92a6b85790f7bc48152ff9b SHA-256: a757b88aa22a52ac7ac590d40e72200b5d78a43d92258ea5389da2ff5730f2b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://nipisod.ru/wix?keyword=bryan+park+soccer+tournament PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5fd0802f5333d.pdfIn PDF document text
    • http://keepsufi.space/48783868480k42m7.pdfIn PDF document text
    • http://salonop.xyz/437362709725cutt.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/bj40oIi/best_free_file_manager_app_for_iphone_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5ff497d197ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5fe63406e4bdb.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/jaQhbhg/gujuzadipebekamizet.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/hdiict2/general_online_store.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5ff5dc60b8870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_6011e279995af.pdfIn PDF document text
    • https://cdn.sqhk.co/gowexenopa/s6ianhe/princess_cruises_customer_service_salary.pdfIn PDF document text
    • http://dvigatel.guru/pifevivebabixfzs.pdfIn PDF document text
    • http://urro-hu.com/desebufi4rem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f939dd4-82f3-4f0e-9542-63209c8397e9/maths_text_book_class_6_cbse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1747e5a2-4a11-4c81-bbc3-aec0b9b630ac/zedudukal.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_60fb23782c4b416cad538a12a7cfea0d.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_9b47fb3db3fa454d817da3846561312f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2491491-5f2a-44bf-b71d-bc6c331ff03a/16986252306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa60dc0f-626d-402c-aae4-e841f5804817/degalanosonodejodizebebi.pdfIn PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_7321d7bf1aa741bdaf564edab03893f2.pdf?index=trueIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_34578b82fc684e5b96674c16b1e08438.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41650aae-d853-4055-9502-ae7d533e89bd/32498471916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6d4eaf-fc42-4da2-9a89-6bf21bff06a5/nokokexokajegoketeni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000cceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEB 5264 bytes
SHA-256: 64771058328e1be329d4d973e8340f5151365b294135c388b949ab951869cf31
font_01_sfnt_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 10336 bytes
SHA-256: e72694967dd6913d041c80abe23f5410ad82cb4f8d8e7505a781b348cd4c4dc0

Open this report in the interactive analyzer, or submit your own file for analysis.