Malicious PDF — malware analysis report

Static analysis result for SHA-256 249aa9d2bc918a1a…

MALICIOUS

PDF

92.2 KB Created: 2021-03-25 13:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443a89905ccf5d8e1452e0a53aa9d3e7 SHA-1: 88dd6641111cb1fb4219764c3112df95d4a7c539 SHA-256: 249aa9d2bc918a1aa4cee151d93b612eb5ee085e0217fd3c0b90a2b532e6e4d4
96 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to educational content to entice users to click the malicious link.

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://midufefew.ru/wix?keyword=chemistry+stoichiometry+review+worksheet+answers
    • http://fosireditoj.mygamesonline.org/archeology_book.pdf
    • https://cdn.sqhk.co/manizamo/gjhjugi/nuzunuwiwolifasureboduwas.pdf
    • http://kozidozilujivox.getenjoyment.net/lilakerogiwe.pdf
    • http://xalenupom.getenjoyment.net/kitchenaid_repair_store_near_me.pdf
    • https://cdn.sqhk.co/vifutetax/gwhdgeR/car_games_2020_real_car_driving_simulator_3d.pdf
    • http://geforiro.scienceontheweb.net/swot_analysis_strengths_weaknesses_opportunities_threats.pdf
    • https://cdn.sqhk.co/laxegipo/Mja3Wjc/mod_zombie_gta_san_andreas_android.pdf
    • https://cdn.sqhk.co/dolafita/jfiiiii/anyone_lyrics_clean.pdf
    • https://cdn.sqhk.co/viwitukaz/bgjhgVc/vijilozujadaxugibekera.pdf
    • http://kurutog.mygamesonline.org/burnout_syndrome_treatment.pdf
    • https://cdn.sqhk.co/reserujaj/fNKIgfZ/capsule_definition_cell.pdf
    • https://cdn.sqhk.co/dagorabowixu/ichcjeX/steppy_pants_hack.pdf
    • http://polobasopika.mywebcommunity.org/22919942237.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/donukadizolin/mofakilevezokuzuto.pdf
    • http://sifebitufol.onlinewebshop.net/fusotipomorona.pdf
    • https://s3.amazonaws.com/mavixu/52550860028.pdf
    • http://muwuvago.atwebpages.com/sixedokomavowawukiv.pdf
    • http://dowuvoduwitovos.atwebpages.com/jejuvodawikab.pdf
    • http://bajekixizosi.myartsonline.com/jufaxowe.pdf
    • https://s3.amazonaws.com/vogubivajavofu/mupamejerawi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107f1.bin
b3a7ac4253539a4e1109567289c41edafcbbb911385aacf14cacbb42b6cb78e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 5136 bytes
font_01_sfnt_off00011958.bin
728c28382d39cb468a40b6278571fd51efcadb88b13914d5b9c63b06bb22ab61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 11092 bytes
font_02_sfnt_off00013f6c.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6C 16144 bytes
font_03_sfnt_off0001546b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1546B 4324 bytes

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