Malicious PDF — malware analysis report

Static analysis result for SHA-256 7558c7b19807bb38…

MALICIOUS

PDF

74.7 KB Created: 2021-03-13 20:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1456124f0a5e59ceaa81cfdf179197c SHA-1: b4c7aa6f960c78567d4e7602477936d1e93b1558 SHA-256: 7558c7b19807bb38a7507b8ecf0958d49fcc290de4e6c88e6639991225467f0c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to a Macbeth summary.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=macbeth+act+2+scene+1+summary
    • https://cdn.sqhk.co/zirizowesaw/REFgigU/adventures_of_mana_review_ios.pdf
    • http://nefritthebestthing.site/citizen_navihawk_watch_rubber_strap29p3v.pdf
    • http://genusadnlo.space/838102281001kcnp.pdf
    • http://kerorukaduwewit.iblogger.org/composition_centsimale_volumique.pdf
    • https://cdn.sqhk.co/pixukinoma/jcKqjdK/30597981863.pdf
    • http://phrensy.co/mivoxodataes9pr.pdf
    • https://cdn.sqhk.co/kuxaroposa/88Eibjc/xetexekerekikodimago.pdf
    • https://cdn.sqhk.co/bikolazasir/iKdQfv9/xikivabimazipipa.pdf
    • https://cdn.sqhk.co/miropefaneka/UjjO3yi/66423106698.pdf
    • http://1pokypki.website/minecraft_pe_0.17_0_apk_download_freecrdc6.pdf
    • https://cdn.sqhk.co/tujarazimok/Wy8hbij/rosurufezogewizesa.pdf
    • https://cdn.sqhk.co/fikubife/g1hjQjg/real_twitter_followers_buy.pdf
    • https://cdn.sqhk.co/fagaxirupunu/gevhjV3/61364217525.pdf
    • http://yourbigdick.space/12018912061sdmg.pdf
    • http://kanshoper.site/58985317404nx7ks.pdf
    • http://jakartapro.xyz/799987720158tfke.pdf
    • http://newberginvestmentproperty.com/vesube4tn77.pdf
    • https://cdn.sqhk.co/moromasi/5E7jegg/givarexafug.pdf
    • http://kersita.space/14420086017vtu3o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://merojupamen.epizy.com/smack_that_tamil_remix.pdf
    • https://uploads.strikinglycdn.com/files/66245053-4713-4e50-bd6b-8d1fc812d1e8/what_determines_terrestrial_ecosystem.pdf
    • https://uploads.strikinglycdn.com/files/a73e1d91-bf77-4070-a0d8-d4efdf2edb75/does_a_500_word_essay_have_to_be_exactly_500_words.pdf
    • http://fesenobonirizu.epizy.com/21794057960.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_off0000e504.bin
c2cd767dbc59d3b4c2c57d264aff0bc6093f0223cd69d3f5e458f8bdc74453ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 5440 bytes
font_01_sfnt_off0000f772.bin
14b8e4f999d7be40fe8f3d041ce43f417535b242242fccd7a2133b045f66c120
pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 10760 bytes