Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15c75ae66ed792b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-13 22:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 62a875c3709fe45578ccf0341d3224cb SHA-1: 15cbc7ae86794701a1c64f903cf6ddf2a5dc40a4 SHA-256: e15c75ae66ed792bd2248cc07e85699fed547d1e8d3f9a638e5b5f498d409c27
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-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.
  • 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://botokaw.ru/award?keyword=antidoto+de+la+warfarina+pdf PDF link annotation
    • https://gubizelejipeter.weebly.com/uploads/1/3/4/1/134131403/2739600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_601d4c8154775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426823/normal_5fdffe61e58a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fd6647e3b9e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500450/normal_5fe40b70715df.pdfIn PDF document text
    • https://fobanuvoba.weebly.com/uploads/1/3/1/6/131637247/a37282f1d7ca56e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_5fe7c074c2536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_60145cdd15046.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/cg_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/how_to_delete_all_guides_in_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/vikiwapirozefuwotixu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/peugeot_boxer_2003_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/kerala_tourism_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/land_sale_agreement_format_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/witosufizogeraxunekorir.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/cabify_driver_apk_6._5._7.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/bibitoxelinudegugomu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/pool_pilot_digital_dig_220_manual.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_off0000ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 4936 bytes
SHA-256: a22ab863ebd1e289e80ae8989663d875b07577af0af3b4e46c1f8d43979ba29a
font_01_sfnt_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 11472 bytes
SHA-256: 85a89621a10e84afc26487e6728d10867a1a3f00de36aa1a749748d17566d8b9

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