Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ecad62c5e17ebd…

MALICIOUS

PDF

70.4 KB Created: 2020-11-12 22:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39f6f6bc3b5ff9f37e8db16d38077491 SHA-1: d9fc4c972bc9d391d8638b648a58c93deecf6051 SHA-256: f6ecad62c5e17ebd225746dd70417b7418148c372fb96d3a94bfa641f059d08c
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://trafffi.ru/123?utm_term=keto+6x+walmart PDF link annotation
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9633892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5fa3919519438.pdfIn PDF document text
    • https://sijoxedewi.weebly.com/uploads/1/3/4/3/134346210/xijumiluxemilinad.pdfIn PDF document text
    • https://tilawebaxipas.weebly.com/uploads/1/3/4/5/134576196/nibusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9ca399cebd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fa0dd3e30587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f93cf6ee7683.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/jeduvixididazolumi.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/fosawef/40844727473.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/morphology_of_fungi.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/phenol_formaldehyde_resin_melting_point.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/meduvalo.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/poshmark_kate_spade_wallet.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/rizewobulujupad.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/cita_para_pasaporte_mexicano_en_tijuana.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_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 4936 bytes
SHA-256: 945bdc4b18a717c9eb5120bc81edf4babefc9bf6c1a4aee59a77342efed40348
font_01_sfnt_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 10620 bytes
SHA-256: 14e08c8fe29eadfd97c523b95e6ded72c4d491a02fcfcf87f28376d51e2dad6b

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