Malicious PDF — malware analysis report

Static analysis result for SHA-256 18039717d8407e50…

MALICIOUS

PDF

66.9 KB Created: 2021-04-29 18:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a03136157899a0fad9560e7e7ce1669b SHA-1: b71a8f9275c8627ae3b132194031a5d5e0ebfff3 SHA-256: 18039717d8407e50dcea1a3ef1f46fd18f3e505d6ebcc962598728b4bf2cfa4f
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, some of which point to potentially malicious PDF files hosted on compromised websites, suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/2035dcf80c90169210d384e00c3769cf/pugupurubexudeli.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/efc908b0bd8ba280b2c2320fcd24db02/2427493788.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/518c8687bff970d2baca2cddf959b10e/11591651968.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607248a9059b1---34014643968.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/dtg2ddfi8qvih2c6uln0bpim69/risazoragefiloguvadujasux.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/7h5mk4vo2e3ss9g03orot0eju2/87353920256.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160709b21887ad---77050277258.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608340cf9a642---bafesidopikidipimatege.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796396c9faa---tapunifopinotitowugajoje.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16074578155abc---32207710213.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607942d13c89f---rupodugo.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160757159d33c3---saxakimebivo.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be71557308---61237961323.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/64ffa9eb6a92d8df74a24a5e6dd71db0/gumujamogafikewubok.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c19f77e3d47eafe2ecd2384333290bff/masofopegipegavos.pdf
    • http://www.aluvascientific.com/UserFiles/file/fonabojovixudajepitugavom.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/d8052f5eefc060e8734ee193116fc4bd/disav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ellipsis+grammar+worksheets
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/55290cced7f2459b9ec844837083d6e7/xilij.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_off0000ca73.bin
5aeb07bf1ac02d2bf5f4f8490aeda8401fda905c545e15afffd81e96c73b6d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA73 5348 bytes
font_01_sfnt_off0000dc8c.bin
1452acc64457a93cc3d5c855a02c6af27fbcf55368190564137fbd7ca6e66ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 10228 bytes

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