Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19d288b857b2d47…

MALICIOUS

PDF

39.5 KB Created: 2020-11-09 14:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 427c71f73d08c751fe8fcae8fe975d73 SHA-1: 5a1727cb279452b490a034d0ed53e6b966acda58 SHA-256: c19d288b857b2d4726d4996337ee9544e6fd35f44314748b27a7bdfdceda764f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising a "pixel gun 3d hack tool". The ML classifier strongly indicates maliciousness, and the PDF structure is indicative of a link farm designed to host numerous external PDF documents. The primary malicious URL is a redirector that likely leads to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?keyword=download+pixel+gun+3d+hack+tool In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5fa1acc04820f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f9013e9675b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f94a75ec8c67.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/2989972.pdfIn PDF document text
    • https://towajusuw.weebly.com/uploads/1/3/4/5/134521237/e9220d57ba1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_5f95b41e76790.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/f94a1888-17d7-43fd-b3cd-1e894237ccd5/12593031595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b2b296-90c9-4226-8b5f-199623f1c8ad/polina_gagarina_lullaby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd739237-de63-47a8-b899-73ae469b67dd/99097549997.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/germinating_seeds_cellular_respiration_lab.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_off00005b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B22 5448 bytes
SHA-256: 5f32a23a63907cfbe29a471970dc9cbd3b2f8b21c35bcabea1b6b48ed27fd4d2
font_01_sfnt_off00006dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 10500 bytes
SHA-256: 020907acd8579657cbbb33309b3936a289651a56d40b94cfece4ac9855ddb6ba

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