Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b636c50d6dd33c…

MALICIOUS

PDF

76.5 KB Created: 2021-02-15 14:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 088b19e26176c4224dcc9ea6a8d5f266 SHA-1: 322e5a17d95d331557ef8a8c286af7c7edd260dc SHA-256: a1b636c50d6dd33c044aa5deea5c153fc462c2db60585113ade344f30c888f67
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/wix?keyword=unblocked+life+games PDF link annotation
    • https://cdn.sqhk.co/demanajinu/MxhbF3v/free_offline_slot_games_for_ipad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454438/normal_5fffefefa73ed.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/ghgihjh/android_system_webview_disabled_for_user_owner.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/aPij3hf/the_great_courses_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fde32dc21cb6.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/Qygdjb4/zozejadezari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_6008f612c2ae5.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/tcgfiiw/coloring_adventure_finn_and_jake_investigations_3ds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fe3e7c518c06.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/lazesej/free_keynote_pitch_deck_templates.pdfIn PDF document text
    • http://nomulumipal.rf.gd/chromecast_for_windows_10_desktop.pdfIn PDF document text
    • http://kemixirutuj.epizy.com/82091250310.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/brave_rewards_not_working_android.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/schematic_symbols.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_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 5440 bytes
SHA-256: d06e5e24c18ebb8800f8950c8f1bdfc2535ec7cd18b90528153b3a4c604b892d
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 10448 bytes
SHA-256: 677d67552309ee95f88dead8c32ce4a58ba86950523ca02fc44a17918854179b