Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73b939e2b47003c…

MALICIOUS

PDF

77.2 KB Created: 2021-02-16 13:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e084f566bf8351dbe7cdf2f92c7d7485 SHA-1: 8c06a6f0c92b1bf73c5b3f22b5acd63d35e99c41 SHA-256: d73b939e2b47003c59efe59a5c09e752409f11a88ca1e3102ec716fde489e429
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to dream interpretation, a common tactic in phishing campaigns.

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/123?utm_term=what+does+dreaming+of+a+cat+giving+birth+mean PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381531/normal_6004ea21683aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_601836cb3e43e.pdfIn PDF document text
    • http://idealica-ufficiale.site/sajodimefqbxhc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_5fda2f2a65647.pdfIn PDF document text
    • http://podjem2.club/wondershare_editor_3._9._11._98t29e.pdfIn PDF document text
    • http://glawerry.online/96625055374wvx78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_5fd34dccf0822.pdfIn PDF document text
    • http://circulshtangcalip.website/sojezezoab6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377400/normal_5fc9068dd0b08.pdfIn PDF document text
    • http://spindlndou.space/86436623056l2xts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5fe5015e9d453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5ff95544d7ece.pdfIn PDF document text
    • http://job-finder.space/aap_se_mausiiquii_songs136qx.pdfIn PDF document text
    • http://bred-enligne.com/ageratum_conyzoides_description9u46l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabodatutowew.epizy.com/35818540196.pdfIn PDF document text
    • http://tisimutugixaji.rf.gd/92882700610.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_off0000edc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 5616 bytes
SHA-256: 8d876f7e4e0c6e87f27d65295a447b31038ed1b74716f23b8ee746f236f47f8e
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 10716 bytes
SHA-256: 3791dd1dc667926b61d25c2be0a0d3a9e5a97823be6a06ed10c6af2eec498498