Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a43c782cf511f5…

MALICIOUS

PDF

33.1 KB Created: 2021-07-20 01:53:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bdb69905156398c1462b7558cdde38e1 SHA-1: c8e72c7b7cd721c8706db9226ff477b1e8e0fa14 SHA-256: 29a43c782cf511f54e58f0623a3d6648b278011fd0d2baa311fd092ab08bded9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/robuxy-com-free-robux-game-hack. The document body text and heuristics indicate a lure for a 'free Robux generator' or 'game hack', which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.tw/app/431946152/robuxy-com-free-robux-game-hack In PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elma.mtsn10jakarta.sch.id/__statics/gudangsoal/files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE9 22608 bytes
SHA-256: 30f356ac69e2f1eb0be32d93ad8f8ba3e3481b43c85a5cccd0ce2aec8059fbf9
font_01_sfnt_off00005e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 18640 bytes
SHA-256: 895c40dcc8ab3e314fdd76083fc6d63a7047cdae3d38e24120e4d24b4e40b9b1

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