Malicious PDF — malware analysis report

Static analysis result for SHA-256 3828c85066c32c1e…

MALICIOUS

PDF

68.9 KB Created: 2020-11-09 18:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 098c6e16125083dbabed341d03e71737 SHA-1: b76b7d6905ef0d1c325b80c60d7343fced954da3 SHA-256: 3828c85066c32c1e34d5b93e0cf2d6e580876f3032452c382cb1f1c27c308a80
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The embedded URL 'https://traffset.ru/aws?keyword=4th+and+goal+2018+unblocked' indicates a lure to a potentially malicious site. ClamAV and ML heuristics confirm the malicious nature, classifying it as a phishing trojan.

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/aws?keyword=4th+and+goal+2018+unblocked PDF link annotation
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/c8077f2b8a.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/654899.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/d98e0a.pdfIn PDF document text
    • https://bitejidiguxuv.weebly.com/uploads/1/3/4/4/134484476/mazawagetifipobedi.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://s3.amazonaws.com/tadevewuju/phonetic_transcription_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cf0962-cf0f-460a-9889-2e105f771089/75862094510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba3d14b-508f-4f08-8fe0-17fe78f56a8a/37483984961.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/34740928848.pdfIn PDF document text
    • https://s3.amazonaws.com/dirijazi/salawegakan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e2f68d-3301-4cce-b242-f4269e3cd367/11716040023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0731fd5-fc08-4edf-9d7f-1461be5daca8/unlocked_paypal_money_generator_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40D 5480 bytes
SHA-256: 86a7de7e162f7cc0706f16d607f6feed3df4a5f93c15ca12403f1ff349e46c2f
font_01_sfnt_off0000d6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A7 10224 bytes
SHA-256: 9c69fdc146828641725c5ea96de91b1a9e5ad87223d2c2f58fce1f240e35b692
font_02_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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