Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69dcbbf1bba4f31…

MALICIOUS

PDF

87.6 KB Created: 2020-11-12 14:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 347ab47dcbeaa1512f79c621b003ac29 SHA-1: de6ef265b558933f7bc3462d756a7dfb84b74e59 SHA-256: f69dcbbf1bba4f31531f983b0defa9d3011646dbe6559a7fe342bd52b7e51d7b
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-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://traffset.ru/123?utm_term=new+smyrna+public+beach+address PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f891fdfaf5a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_5f97c29dd8bd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5f9a824d73359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f8cf246b56b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5f9cbadc789c1.pdfIn PDF document text
    • https://sixexarujizevav.weebly.com/uploads/1/3/4/5/134584368/motudejozex-bitudupudozabus-vipijomevafok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87045aa759c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f8fce537ff05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0af0ab7a-f0b7-4f0a-9802-66cef687146e/knight_phantom_3.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6caa25f0-c7be-4df6-a4ea-680e9a30d656/69372303679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb8f470-37a2-487b-b7ed-b4c68a48a0fd/lijigukosabibevesajimev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a5c56a-5a09-4e6c-b3fd-14d2bd1ffc68/autocad_2017_torrent__crack.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/insuficiencia_cardiaca_congestiva_definicion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 5308 bytes
SHA-256: 0870eaa910956cd5a4beb3745b9a95f31fbf151680b4f3f52e01027d14a212bb
font_01_sfnt_off00011bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB3 11652 bytes
SHA-256: 2aea80e0250d19255cc66c528a9cfba526dea2aae0e14ad98af6769b93039a72
font_02_sfnt_off000142f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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