Malicious PDF — malware analysis report

Static analysis result for SHA-256 388d77069b5f8693…

MALICIOUS

PDF

69.8 KB Created: 2020-11-11 15:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2ddea51acd851ef13050ecac74ffea6e SHA-1: 988355412a12dd1f6a7de5b3a9826b909de3dbe6 SHA-256: 388d77069b5f8693ba3c9595b640ab7c40234dcc5ec671d17e1b5916b0b92069
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 0.9997

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://trafffi.ru/123?utm_term=adobe+illustrator+cc+2018+crack+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f9c0ea3326ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f8d8cd6e6b47.pdfIn PDF document text
    • https://lipitedo.weebly.com/uploads/1/3/4/3/134380968/bdc47e2d8.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/cf165bd78d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f989af9b0c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_5faa47c0db077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fa0477598c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_5fa8c9e495e98.pdfIn PDF document text
    • https://diwefiramogepot.weebly.com/uploads/1/3/4/2/134265367/jatasadaxu_vojinozaja_lakuvobarosofi_sezolamitemudim.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/henghuili-files2/beginners_gym_workout_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/kogewakopuvozefipegik.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/the_power_of_nice_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/gotuwemuxejefexexotuvede.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/xubopepilibi.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_off0000d0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D4 5820 bytes
SHA-256: 7a8b45fd7bba8f4a48d4eafaa26d8053251f6357b62326fcad863769d402a751
font_01_sfnt_off0000e4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C7 11000 bytes
SHA-256: 0e8afd227c7b14d080b54b0f4a0c1dfe3a46e71a58ece383542036a17de7f9e5

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