Malicious PDF — malware analysis report

Static analysis result for SHA-256 674246daeba02212…

MALICIOUS

PDF

86.4 KB Created: 2021-03-28 20:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f57acc5999a9341fe04f766d9f27c5d SHA-1: 4f1e6eca9d86adeb46e96033f30654b8aa62a2dc SHA-256: 674246daeba022121e8db87b75f23f47084c317476b8567a77f9b695d4a12cef
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to medical principles to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://golowaki.ru/award?keyword=principios+de+asepsia+y+antisepsia+oms+pdf
    • http://fapseo.ru/90318469404re3g3.pdf
    • http://silkhfig.bid/unity_of_time_definition_literature7xap5.pdf
    • http://blu-ital.space/59132247014g2w59.pdf
    • http://teagreen.space/can_you_work_at_ross_at_14uve3t.pdf
    • http://inostrana.com/50172736968cq9eo.pdf
    • http://tiktokhd.design/prsu_b._ed_syllabuslugrl.pdf
    • http://fitafipos.iblogger.org/where_is_adobe_acrobat_xi_serial_number.pdf
    • http://mesanezedid.mypressonline.com/garanopasez.pdf
    • http://wegoluxetas.scienceontheweb.net/apresentao_online.pdf
    • http://niburufajanuto.sportsontheweb.net/25449663788.pdf
    • http://tonozezoziw.iblogger.org/30673282014.pdf
    • http://bizowokare.getenjoyment.net/34277169293.pdf
    • http://universal-kirov.ru/4966955035cyquw.pdf
    • http://vupaniseb.iblogger.org/gimejejawezabuwovupirofi.pdf
    • http://hhizmet.com/pamomoxovjo86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aa4a64a1-c69a-4176-9ab9-82648dcabbba.filesusr.com/ugd/70701b_ab9987bc6b164d5ca8434f71c953c581.pdf?index=true
    • http://fomupobidep.epizy.com/grid_paper_1cm.pdf
    • http://kivozusemu.atwebpages.com/zolopitasugawedafu.pdf
    • http://tofedig.epizy.com/miwavul.pdf
    • http://palavujat.epizy.com/symbol_latex.pdf
    • http://dejifiragilu.epizy.com/sentence_combining_worksheet_answers.pdf
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_ea40212384a74ce289655a3d7cea0c4a.pdf?index=true
    • http://nulepavujuzafo.epizy.com/html_to_using_laravel.pdf
    • http://wikolote.epizy.com/what_is_software_development_services.pdf
    • https://acbe2b0b-ee64-4eea-b0ce-372b1aa9cc7a.filesusr.com/ugd/4bcc67_63228f794bd04006889df30517ec4846.pdf?index=true
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_5167fbaccd754056b92475f96fc74aea.pdf?index=true
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_2e5e7b919c254dd382ff535a03e18b9b.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104cd.bin
f0ab14ccb5e9f821be4b3e0b2a2967fff436fc73a0846d6d224010e6501cf9cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 5372 bytes
font_01_sfnt_off000116ff.bin
85959640c08d7bcb1701dba1fba07c5d73379a255d027c90b5ced51d5eeea2ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116FF 2628 bytes
font_02_sfnt_off00012226.bin
a4cbff300c724360b158a3e046d40889b77941aad6d0495f0189fe583d14db4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12226 12504 bytes

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