Malicious PDF — malware analysis report

Static analysis result for SHA-256 131b6140212c9668…

MALICIOUS

PDF

67.1 KB Created: 2020-11-21 12:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58b69dc484468dc1bb0a2a4a25ed4e1b SHA-1: e9a06ca52a5f075df21d93fef34a468aab3bccc1 SHA-256: 131b6140212c96684ba7673ed70ecd37a500e98161680cb5ca9302612b07ab70
174 Risk Score

Malware Insights

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

The PDF file impersonates a cloud document lure, aiming to trick users into clicking a link. The embedded URL `https://traffmen.ru/aws?utm_term=iphone+ringtones+for+android+phone` is flagged as a malicious redirector, indicating a high likelihood of phishing or malware delivery. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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/aws?utm_term=iphone+ringtones+for+android+phone
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/b0771b91587fa.pdf
    • https://nipezititixi.weebly.com/uploads/1/3/4/6/134688951/weguzu.pdf
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8eb6d8b35c9.pdf
    • https://cdn-cms.f-static.net/uploads/4459936/normal_5faf1010a4fd6.pdf
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/89650.pdf
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5f8d45165c059.pdf
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/mojax-gewelejex-jakegi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wefadep/19355497921.pdf
    • https://uploads.strikinglycdn.com/files/fe45d59f-fc99-4216-884c-aef144da62f3/pelicula_completa_el_despertar_del_diablo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb00.bin
9bcc7e0f76c4fcf5fce2cc814efc7937f329dccbfa124496b2b85b26f594c4b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB00 5208 bytes
font_01_sfnt_off0000dcb4.bin
df273c030804e18cb25a1d8ed95c49ab0718d7d732173c28aaa4191edaa3c99e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB4 10400 bytes