Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9651c867269873…

MALICIOUS

PDF

72.7 KB Created: 2021-03-31 15:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 87470607fcac87cdb762c03bb52d8353 SHA-1: 777beb7728ed7b7723f2f951df7dd9e83ae42208 SHA-256: da9651c867269873f2ec6396e7cdc5962ae9a27ab9ea637d2b2161f35baf6091
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that points to a suspicious domain, identified by heuristics as a potential external URI and flagged by a machine learning classifier. ClamAV also detected the file as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the ML/ClamAV detections strongly suggest a malicious intent, likely related to phishing or malware delivery.

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://gimoguvi.ru/strik?utm_term=dodge+ram+frame+repair+parts PDF link annotation
    • http://vixegoxufareka.getenjoyment.net/dekabadezirajageduz.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/teks_texas_algebra_1.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/62383146876.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/roland_berger_automotive.pdfIn PDF document text
    • http://midorezif.iblogger.org/3143439215.pdfIn PDF document text
    • http://wefilevazobakeb.mypressonline.com/how_to_pass_nclex_rn_after_failing_twice.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/microsoft_windows_networking_essentials.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/sazixipame/android_sqlite_database_foreign_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/wugisitudazajaletuxewe.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_19161cc32bbe4197b86a13a680cdda43.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_796670b3f06748728752b9deac3e2809.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/james_brown_mind_power_album.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_e13e258521174353bb0b835c561040d3.pdf?index=trueIn PDF document text
    • https://6558ac43-984d-4e3a-97a1-dec8860611ed.filesusr.com/ugd/c73740_dde73f9ff92c428c9fa063a39cc3fd2a.pdf?index=trueIn PDF document text
    • http://lojofoverom.epizy.com/75_question_bubble_answer_sheet.pdfIn PDF document text
    • http://tufewoxawaw.epizy.com/arris_nvg589_firmware_att.pdfIn PDF document text
    • http://kepewitibafef.myartsonline.com/calculus_made_easy_silvanus_thompson.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/free_worship_guitar_chords.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_off0000de63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE63 5328 bytes
SHA-256: 8eb23b71069b190007c5e19522b8d9aa8f2e9cbb1bbdf05a5a533780e545671c
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 11188 bytes
SHA-256: 50fcfd366ff6d8f33860bf50b5d86d1748ae35ce1c5eed96e9bd853be02547cd

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