Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99458321709b72e…

MALICIOUS

PDF

42.3 KB Created: 2020-11-04 11:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 738d133f594fd60f16fffacfa7b67a54 SHA-1: 3371690b41184e088a4c71f8a22d591386856a5f SHA-256: f99458321709b72e44c9bc73363ff00aff495f4fbdae5b6229610de4f83cf9ba
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is designed to lead users to download potentially unwanted software. It also hosts a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute further malicious content. The presence of a 'download button' heuristic reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=download+snaptube+apk In PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/9408051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f924855962c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_5f9d8ab05e3ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5f8e07a7bb11a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f87cb25bc9eb.pdfIn PDF document text
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/rabinexokaxev-mefopapiziv-zifokobabogib-jadimanujalapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fa119867d0c8.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/lagaj-veraziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f94b4a204600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_5f955ce6ca1c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f892a18dc42c.pdfIn PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/8925867.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000065c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C0 5152 bytes
SHA-256: 34be72aea37d963a2743150576ec994e9b79f1f5c7798f1443d3d1db69d2608a
font_01_sfnt_off00007770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 10936 bytes
SHA-256: 34c9cee7a25650895d47883ed184e9f3a6d63f59e615d9c42ed1644431b127ae

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