Malicious PDF — malware analysis report

Static analysis result for SHA-256 425457d856527dfd…

MALICIOUS

PDF

83.2 KB Created: 2021-03-25 20:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b22c9de3b4da82a4def9d1c91fb3bb9 SHA-1: de4a862ecead89e6ecc4e52cefc758c17cb86155 SHA-256: 425457d856527dfdb3a657d6a323998d57e07f5797cab7d549d5b23111f8101f
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to deceive users with promises of prizes or parcels. The embedded URL 'https://maypoin.ru/award?keyword=african+swine+fever+virus+pdf' is likely the next stage of this attack, aiming to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://maypoin.ru/award?keyword=african+swine+fever+virus+pdf
    • http://poruzur.iblogger.org/qradar_dsm_guide_7._3.pdf
    • http://kazaxofenew.iblogger.org/angielski_alfabet.pdf
    • https://static.s123-cdn-static.com/uploads/4412415/normal_5ffe42215213a.pdf
    • https://cdn-cms.f-static.net/uploads/4450154/normal_60188772318d6.pdf
    • https://static.s123-cdn-static.com/uploads/4452154/normal_5fdf7735b48b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gimufesajo/36872696732.pdf
    • http://roxadib.epizy.com/78668255993.pdf
    • http://zexelebisitod.epizy.com/assembly_system_and_line_balancing.pdf
    • http://julepudelixi.rf.gd/fsot_practice_test_app.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/spiderman_colouring_pages.pdf
    • https://s3.amazonaws.com/lurutopobi/nexijakofupakifivebikun.pdf
    • https://s3.amazonaws.com/savifin/29974802764.pdf
    • http://bumumewevebav.epizy.com/bacterial_sensitivity_test.pdf
    • http://wolawozel.epizy.com/dupofom.pdf
    • https://s3.amazonaws.com/xisefowu/how_to_use_canva_resume_template.pdf
    • https://s3.amazonaws.com/nafibanefexex/demonstrative_pronoun_worksheet_for_6th_grade.pdf
    • https://s3.amazonaws.com/batoragubukepo/75311758570.pdf
    • https://s3.amazonaws.com/lowuwofuxali/78754021998.pdf
    • https://s3.amazonaws.com/kofabube/wutuvejokopuximex.pdf
    • http://mejefelutirarej.epizy.com/deadpool_2_bhojpuri_trailer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e9.bin
7199fd293b5ff3823d77c3c2faa9ff7da2e0160fc5f30db46563fbb97dcc9da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E9 4952 bytes
font_01_sfnt_off00010acf.bin
f60d2171193301db21b9393eeff2a31fe45bad4441b4c5fedc8763afaec6b25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACF 11244 bytes
font_02_sfnt_off0001311f.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1311F 4324 bytes

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