Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e383a030c952eb…

MALICIOUS

PDF

68.3 KB Created: 2020-11-28 18:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dc4447f7690af486c4f9dd70681ab029 SHA-1: b48e92dd771610f63acea4de9a4dd502ce29285d SHA-256: 75e383a030c952ebb9a7d035854d8ba8a59f459aecfee278c66e7a36e0421256
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/strik?utm_term=pvz+apk+obb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5fa53601a935c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f91f64a9e751.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/4edfac1a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5f9897cc93c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_5fa09a9494f3c.pdfIn PDF document text
    • https://fuxogadukuka.weebly.com/uploads/1/3/4/6/134688721/276671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f876231c7634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5f9390a54e1fa.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/wazorixekunafob/90358085188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b241c8-10ef-4a2f-a042-41735d8689d3/41826893203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cb299b-1c8e-4980-8e27-541b3b29caeb/lugafosuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e63297-9ee9-4105-a487-9427bfcf9c45/roblox_piano_songs_cradles.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/jupyter_notebook_markdown_cheatsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/luxapino.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_off0000ca95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA95 4824 bytes
SHA-256: 9e8424d860e80d8dc8dd35bde0a363b89bb3d26d1ed6491a9f22e2366373d153
font_01_sfnt_off0000db24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB24 11776 bytes
SHA-256: 337447b5e62da7e1f5fb70e91029a91778daca406e64a6e07f2550440dcff0e0

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