Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f0b7f7a73826bd…

MALICIOUS

PDF

70.9 KB Created: 2021-01-11 23:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d1f577ae15f226884980df833a67244d SHA-1: d8a4a8b0664a0570c8aa8ede5bf41ac56f7efeae SHA-256: 51f0b7f7a73826bd25f53a4ca601041be5b42f8b3b1aaf8728d078311ca2470d
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://traffnew.ru/123?utm_term=subnautica+mobile+vehicle+bay+how+to+use PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424953/normal_5fe0a1c75734d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_5fb445f30aff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fc59b558d5e3.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/selizopefudo.pdfIn PDF document text
    • https://sukopowe.weebly.com/uploads/1/3/4/4/134499194/wagejaviximiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5fd97b7cae3f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489241/normal_5fb49e570347d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fbe6734ab13e.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/posufij/moparabujapovotula.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/union_congregational_church_eb.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/best_flannel_sheets_ll_bean.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/beckett_baseball_card_price_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/71205487864.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/types_of_tissue_in_the_body_worksheet.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_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 5440 bytes
SHA-256: 9315bc81a3306ce44638805265da90368fca48fc05b4bdcf795628488ed37b46
font_01_sfnt_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 10268 bytes
SHA-256: 13706368e8cab6a7db335c8bac0a497c84d21329e7c62da165de0f09828dfa56

Open this report in the interactive analyzer, or submit your own file for analysis.