Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f738fd508c27877…

MALICIOUS

PDF

67.6 KB Created: 2021-02-25 18:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a2b4b5f7df10e4355bf3c6f92f57e6fc SHA-1: a91c22d7be1a979b38621f79ecb1e66d15ec1d21 SHA-256: 3f738fd508c278771c1468a0ecdb499eb93b0df2bbc774c1b574e446cf4f9eb7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'baarspo.ru', which is likely used to deliver a secondary payload or conduct phishing. The PDF structure and embedded content suggest an attempt to exploit user interaction through a malicious link.

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://baarspo.ru/wix?keyword=comfort+zone+cz499r+space PDF link annotation
    • https://cdn.sqhk.co/vadezewe/icgguIQ/kick_the_buddy_hacked_apk_download.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/what_does_an_er_physician_do.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/ekib7jg/centre_de_formation_ifort_avis.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/aswb_practice_exam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ff7bfac69f1d.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/debotofibusibe.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/listado_de_verbos_irregulares_en_ingles_con_traduccion_al_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421630/normal_5fc9e2b25abb9.pdfIn PDF document text
    • http://letxxnx.org/free_cover_letter_template_examplestmbua.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/39341511483.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/bTy8k1Z/49404438150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fff2e7f341e6.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/lofese/34102368394.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/11739294246.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/europa_report_movie_review.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/advantedge_freezer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/mexico_barbaro_john_kenneth_turner_libro.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/anglo_saxon_riddles.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_off0000cc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC18 5328 bytes
SHA-256: 23ea1f247cd82f74ba1be8657c35e49fe0eb64a5921fc51619287db1ff7f05c7
font_01_sfnt_off0000de2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2B 10444 bytes
SHA-256: ffe11a742647a58c1a9ed7310412f8ff6c8091d2bd1da3d532fc41a11a9fecbf

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