Malicious PDF — malware analysis report

Static analysis result for SHA-256 321fb9c29201f68c…

MALICIOUS

PDF

270.6 KB Created: 2021-02-20 14:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e16bd5be3b8100bc563bc0a1635a7c39 SHA-1: 44106882b20ac9a502ff8f086f4d157e027d6e01 SHA-256: 321fb9c29201f68c3a5ca21558281b7b69fc4fc5c78867ee87eafe730b559080
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to trick users into installing a browser extension or update, a common method for malware delivery. The embedded URL likely serves as a download source for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9557

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jacksth.ru/strik?utm_term=pll+algorithms+3x3+advanced PDF link annotation
    • https://cdn.sqhk.co/zudilubal/gcigegi/diy_dice_tower_lego.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwebobit/jejeczZ/mo_swords_mod_minecraft_pe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388038/normal_5fdfff28d6e3a.pdfIn PDF document text
    • http://romeoplanet.club/dokofevoopd77.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/BlYhg26/23460025582.pdfIn PDF document text
    • http://reliables.ru/fishbone_analysis_template_word654k4.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/igjWDha/rivatefarifakireviba.pdfIn PDF document text
    • https://cdn.sqhk.co/miviterul/fPrkjh8/fake_novel_your_own_tsundere_roof.pdfIn PDF document text
    • http://national-verifyteam.com/international_economics_robert_carba9oq91.pdfIn PDF document text
    • http://fitness-ital.fun/lenguaje_musical_ritmico_1_ediciones_si_bemol_descargartkljx.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/lFjfDhb/22703056637.pdfIn PDF document text
    • https://cdn.sqhk.co/redixebu/jdk5jcD/rider_waite_tarot_deck_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_602802261c0af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5ff91509859c5.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://goxafufi.rf.gd/hppsc_answer_key_allied_services_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/random_amplification_of_polymorphic_dna.pdfIn PDF document text
    • http://vedisupekak.epizy.com/genunamis.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0003a013.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A013 13048 bytes
SHA-256: 642719b6f2f70671bbc4170a3435e4b39b05e7f7fc0c0a6e958d97b78e386b08
stream_009_off0003ff90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FF90 24572 bytes
SHA-256: 216025d9603e6608e297af574956d78636b32cb126bd5bec65e74cd28dd63cff
font_00_sfnt_off00032915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32915 33548 bytes
SHA-256: 7cc2da5c276ca60e909882404790b83e48d75acc73ad182759f52fd96bb7ab4c
font_01_sfnt_off00038d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38D10 5648 bytes
SHA-256: d071eb2cb656225be46768285acf0c7b7f85e20bfd0ede66f0a9672917b53951
font_03_sfnt_off0003c50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C50D 21108 bytes
SHA-256: 1212f44f93cd0ea4a22972bd8d4be718fabcb94ca112a0d47b196b028a0e4474

Open this report in the interactive analyzer, or submit your own file for analysis.