Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fe58d1e8f3500a…

MALICIOUS

PDF

75.0 KB Created: 2021-03-15 18:07:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792e475935b3d5af525a52159f4977c6 SHA-1: a5fd732f1aaad5ca4f00ae4b6eafba63b4300352 SHA-256: 12fe58d1e8f3500a40d90f6d7cc6948e5b93b2f266656a3e837c081e4101b95f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a ML classifier flagged it as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The document body is heavily obfuscated, but the presence of the URL suggests a phishing or malware distribution attempt.

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://vilenefex.ru/aws?utm_term=what+does+vrio+framework
    • http://femomameme.22web.org/29962225832.pdf
    • http://galufixagomedo.getenjoyment.net/taxizubovejivuxafifatukux.pdf
    • http://furofosozunonew.22web.org/fufonizuvopetuxuf.pdf
    • http://bunutib.mywebcommunity.org/83402232111.pdf
    • http://lowadikewafuber.iblogger.org/ge_washer_timer_not_working.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lezopobigeza/67019772634.pdf
    • http://ralirajuz.atwebpages.com/drug_induced_hemolytic_anemia.pdf
    • https://uploads.strikinglycdn.com/files/6f5df4a1-a0b8-4e13-86fb-592c0b6a11bd/viwevokuxakutuxoluf.pdf
    • http://lebasasasob.epizy.com/computer_science_basic_questions_with_answers.pdf
    • https://s3.amazonaws.com/zexozavo/what_music_to_listen_to_at_work.pdf
    • https://uploads.strikinglycdn.com/files/f72ae91d-7bdb-4e88-bf78-8966acbedea3/20491275545.pdf
    • https://s3.amazonaws.com/fusidejebi/mulesipuzesaneduzupekog.pdf
    • https://uploads.strikinglycdn.com/files/66271b8a-128f-4da6-903e-facf5f6754f4/56414570950.pdf
    • https://uploads.strikinglycdn.com/files/e2c5c9b1-6bed-4578-a784-a9a2bed326c2/perdona_si_te_llamo_amor_pelicula_completa_en_espaol_descargar_gratis.pdf
    • http://bajupigirosinaf.atwebpages.com/34797328182.pdf
    • https://uploads.strikinglycdn.com/files/6a9d8c0f-4233-48dd-9800-f43e99152d74/97467113893.pdf
    • https://s3.amazonaws.com/midipes/tesat.pdf
    • https://s3.amazonaws.com/nunakixuma/18834013406.pdf
    • http://lubuzasoxevixan.epizy.com/malazan_book_of_the_fallen_wikipedia.pdf
    • https://s3.amazonaws.com/pibajuwi/how_do_i_check_the_status_of_my_post_office_application.pdf
    • http://xopizoxixinida.rf.gd/kidopemukalopukamuw.pdf
    • http://forojiwimudobo.atwebpages.com/pumatowonosedanoxoxe.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_off0000e611.bin
13b5001bd1746bd327d4d6ff1d8e859df7e6c8ebda5e7e718c01a23a3b3f6951
pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 5344 bytes
font_01_sfnt_off0000f830.bin
01b025b2e096a70e05f1100dfa1244e88ef56565e67d4b81533494965e68550b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 11452 bytes