Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff684013b6e29ea…

MALICIOUS

PDF

71.0 KB Created: 2021-02-12 01:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f007a3eb35f94f860ee7e96adc265a1a SHA-1: eef1f7e5a812df9ab2664fe7d182a78142d2ab20 SHA-256: eff684013b6e29ea2d7f542d31668267cea90d919a6c8a3be962e94de8395991
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting malicious sites or downloading further payloads.

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://leonvi.ru/123?utm_term=legend+of+zelda+sheet+music+free PDF link annotation
    • https://cdn.sqhk.co/mokevesin/ihdkQgd/14875216037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_600b9b8f308e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_60070fd709d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473919/normal_5feb05542cc2b.pdfIn PDF document text
    • http://italy50wow.pro/nowajeduwiwafafajikakib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482849/normal_601b26ea27b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_6025b4515202b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_6021969984f2f.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxegejedak/ggfTBih/brick_breaker_mod_apk_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5ff1e52e9629e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sovizurimi.rf.gd/khandeshi_music_song.pdfIn PDF document text
    • http://xatosizukav.epizy.com/alaipayuthey_songs_isaimini.pdfIn PDF document text
    • http://zonujilulofex.rf.gd/vekovoveliwunux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 5308 bytes
SHA-256: 8a3da460aee185f96b40bae62dbc4579d2d140cf14d043a64dc9b224096bb7cd
font_01_sfnt_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 10076 bytes
SHA-256: 928b7713d60c69f83204da566f8073c02b3e4d440697e13b98a9e56eee232618
font_02_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71