Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd257b1968829b5…

MALICIOUS

PDF

83.7 KB Created: 2021-01-26 08:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e3aa6979bb06c51d5a681330f023c35d SHA-1: dc7c159bd60eb13c8ef3e1fbfba17912caae692e SHA-256: afd257b1968829b5b218dc35e26d39b16f31372f2f865dfb32b2dbdf5c9d7d59
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 a suspicious domain, which is likely part of a phishing lure. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=uci+financial+aid+office PDF link annotation
    • http://kijorifoweb.22web.org/gumovokakebakujurumisuw.pdfIn PDF document text
    • http://dfwshootersupply.com/my_flixster_after_we_collided5vsua.pdfIn PDF document text
    • http://persequen.com/tyrion_lannister_father_deathm4glw.pdfIn PDF document text
    • http://xexogafuko.22web.org/mokewedodizawakebexoporuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375087/normal_5fec1e4b91716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_5fe8ab0c2d05b.pdfIn PDF document text
    • http://maykistore.ru/go_viral_digipowerjne44.pdfIn PDF document text
    • http://mozujana.22web.org/bittorrent_for_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369802/normal_6000451ff38df.pdfIn PDF document text
    • http://bezprovodov.guru/smart_recorder_voice_recorder_voicemailrzc2g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/pc_full_form_in_social_media.pdfIn PDF document text
    • http://masekafisixovok.epizy.com/battledogs_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/jalebi_game_answers_level_7.pdfIn PDF document text
    • http://tuxizosog.rf.gd/fekuzubaxudovelewazu.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/pexelilezureziwus.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/77165244305.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/sheet_street_head_office_contact_number.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/bolly4u_hollywood_movies.pdfIn PDF document text
    • http://lomurobutu.epizy.com/7726682150.pdfIn PDF document text
    • http://rewifavad.epizy.com/lepefunimikesawewi.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/azote_formule_brute.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 4732 bytes
SHA-256: b8606e9379046d26c2e81f5ac207f48a842a6b60bae00f025ef0e2c5792926ab
font_01_sfnt_off00011c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C93 10720 bytes
SHA-256: 179b3e2b574fcb86aed8568e000d64e84df4c6eaf7e56248dbee93f9731a2810

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