Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cddcdd16c9a31d…

MALICIOUS

PDF

82.7 KB Created: 2021-04-03 13:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2b3e0a9c01d982da8c67dd23c47eb867 SHA-1: abfee24329de8d4966d8982a063664f4f4f04799 SHA-256: 04cddcdd16c9a31d17a498f8a0b6fad767a06ed0106aa9bbf55757bfd2ca22ff
96 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or a second-stage payload. The document body is heavily obfuscated, but the presence of embedded URLs and the overall detection profile suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/strik?utm_term=encyclopedia+brown+what+age PDF link annotation
    • http://proita.space/filedonepawlcqeb.pdfIn PDF document text
    • http://nominasacra.ru/wukalrkkgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_602d0e656ac19.pdfIn PDF document text
    • http://spacexfoundation.net/40507975496hb4gu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450727/normal_600457d8789ac.pdfIn PDF document text
    • http://topplafond.xyz/virefuvesakovozujitezadmel8a.pdfIn PDF document text
    • http://italiabeach.space/nintex_workflow_update_created_bykx9oa.pdfIn PDF document text
    • http://dream-stat.ru/97825797935zb4rp.pdfIn PDF document text
    • http://rollernefrit.xyz/nogefedejk29z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_6060473563115.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/bookkeeping_basics.pdfIn PDF document text
    • http://dmgameplan.com/real_ps4_emulator_for_android_2019g2ogj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_60342272922c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_604e361079ff9.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/rutufokedizon/android_10_beta_for_oneplus_7_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/966684521.pdfIn PDF document text
    • http://posikin.myartsonline.com/acidemia_organica.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/minar_islamic_calendar_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/nintendo_ds_emulator_android_pokemon.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/music_audio_editor_cutter_apk.pdfIn PDF document text
    • http://wegorabeg.atwebpages.com/47413870596.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/canadian_citizenship_test_practice_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/how_to_solve_figure_logic_puzzles.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/zobovonupo.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/kamezexiziwamuvad.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_off00010665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 5448 bytes
SHA-256: affa5c6166a2cd54dcd6e0af260a9bfb77a25a95abdc2bee97cfe017557853cf
font_01_sfnt_off000118ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 10664 bytes
SHA-256: 7036c8c7a3832ace28672b49b46a5eda70e71048f28bb32185a7720e56a8d093

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