Malicious PDF — malware analysis report

Static analysis result for SHA-256 594db9216bae73c4…

MALICIOUS

PDF

77.4 KB Created: 2021-03-17 01:26:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d20f61a6040710c47debd03e31d8063 SHA-1: e14fa19032c35dd14e0f4c65f85cd87b48bfd852 SHA-256: 594db9216bae73c40535ee51bd2a2852f418602ca3bd62d5312c1eecf616e425
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to an academic study guide, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=freshman+biology+final+exam+study+guide
    • http://fudasoba.iblogger.org/kikuyu_catholic_bible_download.pdf
    • https://cdn-cms.f-static.net/uploads/4411919/normal_602ce8ff15545.pdf
    • https://cdn-cms.f-static.net/uploads/4450732/normal_5fd18eccc6b78.pdf
    • https://static.s123-cdn-static.com/uploads/4417221/normal_5ff28fa708efc.pdf
    • https://cdn-cms.f-static.net/uploads/4369162/normal_600aa10aa7b11.pdf
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5ffff6db3756f.pdf
    • http://vazutokidoxe.iblogger.org/what_did_the_bible_say_about_enemy.pdf
    • http://tasefuvakol.22web.org/buxitonupejijuleparive.pdf
    • https://cdn-cms.f-static.net/uploads/4483345/normal_6016fa27e36ec.pdf
    • https://cdn-cms.f-static.net/uploads/4447263/normal_603191c66138a.pdf
    • https://cdn-cms.f-static.net/uploads/4369519/normal_601a6458c6fb0.pdf
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fe076b99efbc.pdf
    • http://zozuwax.66ghz.com/73870101089.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://marakolin.epizy.com/e_signature_google_forms.pdf
    • https://uploads.strikinglycdn.com/files/517b7c33-f387-4783-b295-7d5e6a835fe0/lazupisiluz.pdf
    • https://uploads.strikinglycdn.com/files/de46f856-449a-44a8-aec6-414e233a2d7e/american_eagle_outfitters_logo_history.pdf
    • https://uploads.strikinglycdn.com/files/9fe4f8f9-79d9-4225-aa49-c6a7f6a4d14a/pdp_gaming_xbox_one_controller_review.pdf
    • http://lepogulajobuguk.epizy.com/temario_administrativo_del_estado_turno_libre_gratis.pdf
    • http://kadegezopofog.rf.gd/powerav.pdf
    • http://sivojosifa.epizy.com/infosys_corporate_governance_report_2018.pdf
    • http://jamigiboweb.rf.gd/intussusception_rch_guidelines.pdf
    • http://wudobez.rf.gd/96261993508.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_off0000f0f5.bin
09607777c79ffde8e1044abc4b13a0a49db524d93e4dc88c9dfc0be354af8ab6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 5588 bytes
font_01_sfnt_off000103d6.bin
3d2bd714c7b23073f10b2f620929e0f9a096f667f07bfa2ad8f949298abab01a
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 10500 bytes