Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a9ca8ba9cc395c…

MALICIOUS

PDF

87.4 KB Created: 2021-02-21 06:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a6058b9200e58c550b5685f0a09e4fc0 SHA-1: 562ba4e685b12204a55578aafcf30c91251e94c9 SHA-256: 02a9ca8ba9cc395ca7c78942c7da9f4e1b15166920c0f12e7d0a6d1c2a059cfd
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'jacksth.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to a product review, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=delta+unifence+saw+guide+review PDF link annotation
    • http://reduslim-eu.site/17324160232tr022.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/fa96d62e29cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426971/normal_6009eabf38c46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417214/normal_5ff81aebbb803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_60203f50ddf75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378620/normal_5ff68433b3b34.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/vinokobitil-mezofesut-mipig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475875/normal_5fcb2722dce5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5feb3b9a5d7a3.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/dudujopixejikug/95874248801.pdfIn PDF document text
    • http://falivodekolulo.epizy.com/tecumseh_carburetor_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/29825589980.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/62531759529.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/99097753270.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_off00011b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5A 5340 bytes
SHA-256: f8d98ef0e6e2c0c38742c99196237446f805d02b47ccadd17def4c1236ac2132
font_01_sfnt_off00012db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB5 10208 bytes
SHA-256: b040a9225ec1c98079cb3352d2ad0b4108f0727e67265723fcd40f9819a095d4