Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e24ffb2ae5bebbf…

MALICIOUS

PDF

83.8 KB Created: 2021-03-30 09:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0433f9adaff3590668b7066ea939cf45 SHA-1: 5c55388e553f0d0d94b9bbc93dfdbdfa78845468 SHA-256: 4e24ffb2ae5bebbf62f0dca5ceb8f01f357afad3953562c794d78739c9d76dbc
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a technique often used in SEO spam or to redirect users to phishing or malware distribution sites. The primary malicious URL identified is https://kuzutuzo.ru/wix?keyword=apkhere+nostalgia+nes+pro, which is likely part of the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/wix?keyword=apkhere+nostalgia+nes+pro PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ff3844cb0f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471941/normal_60109da602d67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407780/normal_5ffc68cfc630a.pdfIn PDF document text
    • https://pipizodo.weebly.com/uploads/1/3/4/3/134352326/xaseve-zefexifajod-gadedenanu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fcdd74e1a521.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/9354065.pdfIn PDF document text
    • https://vetukagur.weebly.com/uploads/1/3/4/3/134358228/251240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_6055f79bb9efd.pdfIn PDF document text
    • https://gupobotinifetex.weebly.com/uploads/1/3/4/3/134338345/42fec2ed2a.pdfIn PDF document text
    • https://jazitilifa.weebly.com/uploads/1/3/1/4/131414561/3820695.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/muvemasoxaji/nursery_songs_malayalam_free.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/30899674255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1156a80-9f83-4595-a179-b8f8cbe74a24/misavibadasugibopa.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_9a170fc23e424c46bb90bac982e247bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd3a562-7af9-4e3b-bd92-18cbcab995c9/14566821717.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/27848081854.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/36166874372.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/why_is_my_dymo_labelwriter_400_not_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/puxewobuvukibebetagofow.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/clone_github_repository_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc04ea5e-6b95-4c8e-8c85-c10b077de3d2/kazumakiw.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_08e44824dee6420a8ae2f8639c9aea6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05592bf-d979-46c2-92a2-7a2d0f48f39b/zozuxurazupa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 5136 bytes
SHA-256: 093a13810073c0c2ebc5501ae6969868f6eb09f77d2d634d4467d2e9aabecf1b
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 11468 bytes
SHA-256: 4332d65b8edd1840cfda1117e154adeac773c04f17a1ce9cb723cefbb83f6fa6
font_02_sfnt_off00012c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C13 16140 bytes
SHA-256: 08ce7fa123a17e35ac8ce4a6b895f951cf435d4f08762552a227d4dba3f9a3ec

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