Malicious PDF — malware analysis report

Static analysis result for SHA-256 450d9a8e23324e26…

MALICIOUS

PDF

89.7 KB Created: 2020-11-10 08:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38760de8fdb2d0e20df4b0bd83ba888c SHA-1: 94c75bbd99a6c78acb5ac45ff19261081cfe00ac SHA-256: 450d9a8e23324e26841e2386567b4f43c6f259b904ed1603dab7646134cb8e25
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://traffking.ru/aws?keyword=south+carolina+career+information+system+cis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f87c2ab8f82c.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/4270001.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/0a7eb905579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f88e3689ca00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f91a95016eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f984f45cb6d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f9a87294eb97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_5fa16b908c0f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5f9a035beee99.pdfIn PDF document text
    • https://puwisubefubozaj.weebly.com/uploads/1/3/4/5/134516422/9c74c5a9d6c5f5.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/3930b56.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/89f05f9b-980a-4c22-8280-511fd57d23fe/guia_conamat_bachillerato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c09f12-0d61-4eca-ab98-384dd2015f91/32081131218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d06deeb-26e0-4dd7-b900-df19d02e32a3/mobogepudejetedibutavibek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10db7983-5571-463e-896e-6cfda6582b00/89638084293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ebe835-6aa1-46d8-929c-8207431c2db8/badokagomuk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001234d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 5324 bytes
SHA-256: dea2bd172ad940d398ae9a9545cf8a585e4d0a218fb5a5a2128a58f2579f7526
font_01_sfnt_off00013548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13548 10744 bytes
SHA-256: ae00fe6fd49dbb96363a9501f77233ae9bbcffccbb0d4195abb4d2ec33802a3b

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