Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f288d0812e2a90…

MALICIOUS

PDF

68.7 KB Created: 2020-12-26 05:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 13c8f280f24cf7d0cb1ae4ccc2657cbe SHA-1: be0f3494acba254955cca30f7941e69a48949b07 SHA-256: f0f288d0812e2a90bdfbb7dc376504c527f17c940a3cf8972028b93094f2c5af
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=metallica+pro+pinball+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408355/normal_5fa40a1391347.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/2341066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fbf671e3dd2b.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/dovavotinitam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451376/normal_5fe2f4a261eaf.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/gedimuta/38995689942.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/7111078322.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/bamhi_fermentas.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/79629639106.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/60846382641.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/blind_man_s_bluff_book.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_off0000cfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE4 5140 bytes
SHA-256: 3d7f92bdb1cc23b701881434fbb471e9b4c05a39b757deb8beb1bb4d8be7b1dd
font_01_sfnt_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 10988 bytes
SHA-256: 61812c858d54191b807d7b5731aba692d3cffe9c6c493976aa075da94298a7cb