Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e30837e34aff2c…

MALICIOUS

PDF

73.8 KB Created: 2021-03-12 08:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fbaa6805b3a1b20039b11dcb284835b0 SHA-1: c551e34626fb44b8c3d56323739c48dbad83e4ef SHA-256: 76e30837e34aff2c1d5fa3123b4f6f90a4ad108129abfe3c18c5de77cf5a0288
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, masquerading as a document about 'deep breathing exercises'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=deep+breathing+exercise+adalah+pdf PDF link annotation
    • http://netzamka.ru/houghton_mifflin_harcourt_answer_key_grade_3963oi.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/nelebebofesixobuwu.pdfIn PDF document text
    • http://d2-club.ru/8251232543729fw0.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/apache_hadoop_tutorial.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/zokonos.pdfIn PDF document text
    • http://grandov.pro/curso_de_ingles_avanzadofjx5r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wudemexa.myartsonline.com/zalapelexerisupizofik.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_e279348bb11c4d738a9bafe8c9b75450.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/kugeweg.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/abox_t22_projector_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657bce80-3bdb-40fe-9967-e862a698b3d8/ldg_kt-100_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344817f2-85a1-4a70-879d-d988dd8a001b/bufovubovibadod.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/retalasoniredovaw.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_6b95e302cb8f4bad9d5d2300bdbfe88b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/instagram_report_impersonation_account.pdfIn PDF document text
    • http://gegetebipa.atwebpages.com/42629209046.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_12d4c52222bd47f591bb68202cdef6ec.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_ba346ade0f4b4434bed868897647164b.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_7b77b4b251df42a6bcf09b7dc13d1ae4.pdf?index=trueIn PDF document text
    • https://doi.org/10.24843/MIFI.2014.v02.i03.p06In 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_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 5624 bytes
SHA-256: 3e72da34f2bd3cfd7b59d9e6ea9f5928063e8d37848d4ae851c1fbc3a0e1eeaf
font_01_sfnt_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10100 bytes
SHA-256: 0edc7324eda57fc0c07c026eb69805e89ea85929e2c5f823aa578bdcbb73a88c

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