Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ba7880d4fc1171…

MALICIOUS

PDF

75.7 KB Created: 2021-04-08 09:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42322ef0a001fed099f23e519e31fc2 SHA-1: f6357d6de698d9187e4f3f5b40c1a7b1045a32b7 SHA-256: 51ba7880d4fc1171da4b7f140b6de76db7ac07a5baffd0f68b59e1134841121e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious URL. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to reference a Nespresso machine, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jottigo.ru/strik?utm_term=nespresso+lattissima+one+by+delonghi+silky+white
    • http://ganalozugimak.iblogger.org/nalelakisupufe.pdf
    • http://4gusevshop.space/aisi_1020_standardmoo0o.pdf
    • https://cdn.sqhk.co/jiguluzufuwa/xgdEFW4/76368706194.pdf
    • https://cdn.sqhk.co/texojijoraso/6IhjDHp/19263572849.pdf
    • https://cdn.sqhk.co/wuvotalek/KGIicdP/69463045365.pdf
    • https://cdn.sqhk.co/rixutixim/f3hhgdo/18300369304.pdf
    • https://cdn.sqhk.co/rovifatira/amjilMD/mevedexutaloseri.pdf
    • http://krym.today/mathematical_physics_boasusgxv.pdf
    • http://itsamorem.com/homedics_sc-531_manualp4kge.pdf
    • http://clientbluebadge.com/nunomuvawizelerj97ke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fadoxom.epizy.com/mapa_de_alagoas.pdf
    • http://nenedabex.rf.gd/photography_consent_form_template_word.pdf
    • https://uploads.strikinglycdn.com/files/fd6404b5-5c21-4b3d-b53e-5ea21f835009/best_calorie_counter_app_2020_uk.pdf
    • https://uploads.strikinglycdn.com/files/14b4eede-1b60-4911-8208-8091f536fc8a/fijidubof.pdf
    • https://s3.amazonaws.com/turip/stock_audit_report_format_in_word.pdf
    • https://s3.amazonaws.com/sifawekujiki/joburolub.pdf
    • http://biguvuxurezuto.epizy.com/fake_caller_id_cracked_apk.pdf
    • https://s3.amazonaws.com/rujabepifar/ipod_nano_6th_generation_charging_cable.pdf
    • https://s3.amazonaws.com/pukaridimupo/76569735923.pdf
    • https://uploads.strikinglycdn.com/files/5e32d989-7861-4745-8932-ff0505bd154d/sitir.pdf
    • http://fonimegalidoxu.epizy.com/amaravathi_tamil_hd_full_movie.pdf
    • http://lijulipewagikev.rf.gd/filmywap_2019_hollywood_bollywood_movies.pdf
    • http://vijekidifo.epizy.com/mejafirunagodixiravuk.pdf
    • http://muwiliwus.epizy.com/pefitugidadadokirupu.pdf
    • http://lerapavuzuloz.epizy.com/xigebub.pdf
    • https://s3.amazonaws.com/genedesowul/tp_link_tc-7610_setup.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_off0000e961.bin
3ae7639717798a4cb8ac07c4710e153b79e81c3ed8057a155c8fd4cfa78c3ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 5740 bytes
font_01_sfnt_off0000fcd4.bin
9fc533896ffd6cf9725560c430b2e3ff674e13f8d74fda1188db8fe308b1887a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 10548 bytes