Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ed080903323e81…

MALICIOUS

PDF

84.7 KB Created: 2021-03-23 04:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f32f3c377c029e329853688dffefb48c SHA-1: 50b0d00d406604acee3ff9e17469dec0e67ca1ec SHA-256: 00ed080903323e81fc5710d1f194ee271b64517cf4b4ae2d409bea6ef9098373
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. The document body, though heavily obfuscated, contains text related to 'isotopes and atomic mass lab answers', likely a lure to entice users to click the embedded URL. The primary IOC is the external URI pointing to 'maypoin.ru'. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/wix?keyword=isotopes+and+atomic+mass+lab+answers
    • http://mufosubofamar.mywebcommunity.org/alone_together_book.pdf
    • http://tonedomopoja.scienceontheweb.net/how_to_tell_if_diesel_fuel_pump_is_bad.pdf
    • http://mezogevap.mypressonline.com/denujepixupajese.pdf
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fc9c0feca9dd.pdf
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5fe124dc208e4.pdf
    • http://berilunowalaz.iblogger.org/daxafiliwilorobiwedugetot.pdf
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5ff709b3d18fb.pdf
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fc6b985a64ec.pdf
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/seburudebawuleroxeno.pdf
    • https://cdn.sqhk.co/pipujevi/dhgghKs/odd_eyed_white_cat_for_sale.pdf
    • http://jetavof.sportsontheweb.net/muvexexilajafipiwejewezu.pdf
    • https://cdn.sqhk.co/zuvifilezaja/jihchj0/wulapegi.pdf
    • https://cdn.sqhk.co/paleguvebo/hbZQwNM/wokofexexepepudumagoxiro.pdf
    • https://static.s123-cdn-static.com/uploads/4374199/normal_5fe293d42b724.pdf
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/7833307.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_99dec4d8ae6842619bb0384c0062123f.pdf?index=true
    • http://vekaxuluxixabev.rf.gd/ice_troll_cannon_guide_osrs.pdf
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_4d37a8885e5949768b1a238e6da9df54.pdf?index=true
    • http://poposumezaxek.rf.gd/tv_setup_guide.pdf
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_84c6b05f99ad4d468badd6088431fdbc.pdf?index=true
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_57e6775ad5cc4ff7bb3d00ce64802272.pdf?index=true
    • http://sefokirof.onlinewebshop.net/swot_analysis_article.pdf
    • http://gevovedejege.epizy.com/tapumowesebixadof.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_off00010b93.bin
7b912e33040998c7857edaca14e8c1c5001e94397e0616081cad7bca399802ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 5388 bytes
font_01_sfnt_off00011dde.bin
e1328cd0c938d724cd9883b9baac053aa6415bbd42c62d4cf4a87443ba900cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDE 11388 bytes

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