Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d825e695fd12789…

MALICIOUS

PDF

41.7 KB Created: 2020-11-01 10:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dd79f416b19ea9dd8c7d4ba0eb94d5d0 SHA-1: be7e267a4809cb2cfdba18af247e27572e4c8426 SHA-256: 7d825e695fd12789b94df4a08e947746439ca17837695fb8c514fac8827fdca5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure impersonating Instagram to trick users into clicking a link for a "free Fortnite accounts generator". This link redirects to malicious infrastructure, indicating a credential phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a password-protected archive lure suggests a multi-stage attack.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/gapusumaluso-batewuboked.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=free+fortnite+accounts+generator+2020+xbox+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f87587da0f8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_5f9481935365e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f9e0048010a3.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/gapusumaluso-batewuboked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f8e49d2ce503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f9db9a33b019.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/6248906.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/4f05e433-dd64-4873-abab-8b542607cdb5/magipujobibama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f747276b-e0a4-457a-987c-a7f3f82ece3e/1396162432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4e7b77-5155-4f0e-a2af-fd93771843c8/bosozisarokofexokepuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4732/0227/files/zavisozupud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a609ed-6e4f-4b47-a5ad-1d20204029f0/13101534844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8e42fd-4fc3-49c4-9422-e8decf29d32a/biwedalajarusubuvurezal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bda26f-3a15-4ff5-a5f0-72e82438f597/top_fin_powerhead_30.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_off00006437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 5504 bytes
SHA-256: e86af762d302acc822fd81506aba85ca9ac359ee57cef886a19b488644572459
font_01_sfnt_off0000770d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770D 10000 bytes
SHA-256: d6a7a0119fb93d41b92022b8d8f542fa7c56174cc465765716e22414f4090eb2

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