Malicious PDF — malware analysis report

Static analysis result for SHA-256 99469995c4128852…

MALICIOUS

PDF

70.3 KB Created: 2020-11-14 21:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f9de6e61785b5cc68f511ff91e6f00b3 SHA-1: 2e988392ea80d1bfd42dcd502a05698940a427e9 SHA-256: 99469995c41288528bedd259fd02073f1aa81cc18a5e91ae4e5535dc1868fc40
156 Risk Score

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 0.9995

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://traffnew.ru/strik?utm_term=lyla+porter-+follows+nude PDF link annotation
    • https://nawowelefet.weebly.com/uploads/1/3/4/4/134498780/2789157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_5fa1a4613283b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f93596e871b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8f6e32606c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f9c46f150e30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f9494ec67183.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/42862282-8ae1-4b93-b012-441cc5371232/radan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d2616c-016a-42d1-95d7-331d8106914d/89292800783.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/vizikuwiroliluzapelixa.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/xazoruzovodixivosufumavog.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_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 5204 bytes
SHA-256: 6d79e4a7fc3fc3ba6ae2ec01de7d1ae39a129e664ae7f3c14f83f68366d9d2c3
font_01_sfnt_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 11316 bytes
SHA-256: cc27127a7f9798c407333b8d0ad7991136df064803883197d0f85809090f8b06