Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c475ae877ffee2…

MALICIOUS

PDF

69.9 KB Created: 2021-01-23 00:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e939f5c23346e4bd2e8787617d73ad83 SHA-1: 7ac94c2a546fd8301e5fd6615943f1a7206be35f SHA-256: e4c475ae877ffee2c69bab38fee0690818837a760a827ffeb7ce5c1adc5c5a2b
104 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. The embedded URL and the heuristic indicating an invoice lure suggest the document attempts to trick the user into visiting a phishing site. The PDF structure itself does not contain executable scripts, but the presence of external URLs points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/aws?utm_term=utility+bill+spreadsheet+template
    • https://site-1175201.mozfiles.com/files/1175201/67914424855.pdf
    • https://static.s123-cdn-static.com/uploads/4486033/normal_5fdf8ff169f42.pdf
    • https://site-1218469.mozfiles.com/files/1218469/simple_keyboard_notes.pdf
    • https://static.s123-cdn-static.com/uploads/4471275/normal_600001b3b1720.pdf
    • https://static.s123-cdn-static.com/uploads/4479222/normal_600067f16625d.pdf
    • https://static.s123-cdn-static.com/uploads/4451355/normal_6007b2b22cbb4.pdf
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5ff0136bedbeb.pdf
    • https://static.s123-cdn-static.com/uploads/4464078/normal_5fdf786ff340b.pdf
    • https://site-1178179.mozfiles.com/files/1178179/atomic_bomberman_classic_online_multiplayer.pdf
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fd9e41f8dd0f.pdf
    • https://site-1174404.mozfiles.com/files/1174404/kaththi_mela_kaththi_tamil_song.pdf
    • https://site-1179057.mozfiles.com/files/1179057/moto_x3m_pool_party_kizi.pdf
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5fde22b7f0477.pdf
    • http://bonapimum.iblogger.org/cbs_channel_2_chicago_reporters.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sotexazonilot.rf.gd/apple_developer_software.pdf
    • http://wowifimeziv.rf.gd/pululilaxisafakoki.pdf
    • http://renirorevebu.epizy.com/bamurawofonazutaxafof.pdf
    • http://fisuzes.epizy.com/chrome_browser_for_smart_tv.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_off0000d49e.bin
f5da09a62772f33aaf8f337ac4a67e859219692c0c2fb73f91cbef9dc75828eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD49E 5432 bytes
font_01_sfnt_off0000e6e6.bin
232a150997622f136d035d5091c1c848cc5071f1cc1a643430990004ffe15a90
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 10416 bytes