Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a81e97599349c62…

MALICIOUS

PDF

78.5 KB Created: 2021-03-31 23:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c543b4564f2c431b9eefc451de4a0e5 SHA-1: 168e3ecd58c58c6e818de3914f531d7126602211 SHA-256: 4a81e97599349c629992d4f5ed2564ff8c37e88ac338b8f68f4b94557a6c3e4d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'human rights' to entice users to visit the external URL. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=interdependencia+de+los+derechos+humanos
    • https://static.s123-cdn-static.com/uploads/4379049/normal_5fccbb947c4ad.pdf
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/vibigufivumat.pdf
    • https://static.s123-cdn-static.com/uploads/4494888/normal_5feffbf2e4ee5.pdf
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/0b36708d.pdf
    • https://mixutexevegov.weebly.com/uploads/1/3/4/7/134706804/gutebim.pdf
    • https://cdn-cms.f-static.net/uploads/4366384/normal_60226dfd1ff77.pdf
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/sarulamowit.pdf
    • https://cdn.sqhk.co/vizinifum/fjjtgfr/kinizon.pdf
    • https://static.s123-cdn-static.com/uploads/4472479/normal_5ff1589d14b8c.pdf
    • https://cdn-cms.f-static.net/uploads/4416810/normal_6026da217e69a.pdf
    • https://cdn.sqhk.co/nejokigesege/8gchhde/dishonored_ps4_trophy_guide_and_roadmap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xebuvuwov/philips_automatic_pasta_maker_review.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/25983668536.pdf
    • http://dipobitabi.rf.gd/91147575234.pdf
    • http://bimemulu.rf.gd/godrej_properties_annual_report.pdf
    • http://fovuderes.rf.gd/preschool_activities_worksheets.pdf
    • https://s3.amazonaws.com/nutanigonu/59715313879.pdf
    • https://s3.amazonaws.com/sulasatevirexo/joxutib.pdf
    • http://tibuwol.rf.gd/acute_gastritis_treatment.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6db.bin
b53159d509bfac27f3b97a5212d7240a553af283c63f5009dbf1bbc388fecd03
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5132 bytes
font_01_sfnt_off0000f80b.bin
5a61a253ee2cd50dbecebba970a33112b9899b8d24f045f34f16e37d9683a15e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 11128 bytes
font_02_sfnt_off00011c9f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 4324 bytes