Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a00ea174ce6b26…

MALICIOUS

PDF

69.2 KB Created: 2020-11-25 11:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4ac2c2d31669c0fa1fcd5ad294459f7b SHA-1: 57c0bf929002854c50d1ab0e37b6070fe3495538 SHA-256: e8a00ea174ce6b26e42b5d98b22527b24309b7e5fef1fd46274101baeb8ca4c5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9998

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.
  • 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://trafftec.ru/aws?utm_term=tangled+the+video+game+free PDF link annotation
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/a590db3175.pdfIn PDF document text
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/vojevekijuseb.pdfIn PDF document text
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/gudopotivoreku.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/1c281f31-b167-4dce-83b5-c2399ca343ce/mitexidanipisejimifila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167ae0a8-f5e9-489f-b13e-11c66efeacfe/47759378245.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/zhiyun_smooth_4_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/ios_magazine_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1470e8bf-e92c-481f-80a3-f6f0dc6aacdd/selimazoferivob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edda867a-3db1-427c-8136-3df388e9f719/mogov.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/kubuwixiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37497914-45f8-43a6-88a5-1239ec201269/19749139938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7602d073-aee4-4708-bd8e-e5c5ee2af6dc/disexixebemanazewenadaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/11614902076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcd75ce-b973-4532-b336-6892a8b8ba1a/gimunamenipozud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6032e75-3137-4fa9-8406-3523d2ba1021/breaking_the_habit_of_being_yourself_meditations_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/accumulated_depreciation_balance_sheet_classification.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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 5152 bytes
SHA-256: bcf52a0cc43009f66651c7801d7fa8b05d2ff029f87a5032185a5eb91e31707f
font_01_sfnt_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 10848 bytes
SHA-256: d11db016f610932cd76e38a41d65fbd9fe9438e44c23fcb1eb16a7a14e791928

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