Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d1b0c0120c501c…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 21:42:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 13cd17f3cac48b582f901f2b61cc0cb7 SHA-1: 9b6d0720c4e837571b81bb7fdfc0de4ab09c82fa SHA-256: 33d1b0c0120c501cb6fa408225438c26cd188110ed3b78e881e5ed3d0724c686
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising free game hacks and currency. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of these links. The document body and embedded links suggest a social engineering lure to trick users into visiting potentially harmful websites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/free-spin-sites-for-coin-master-game-hack In PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/quick-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/uirbx-club-roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/free-promo-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/get-more-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/roblox-free-robux-code-april-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kulonprogo.sch.id/__statics/gudangsoal/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B8 22736 bytes
SHA-256: 4a028689cb70ec03249807f3664138825788fcf3514ae0f75c4f988d12a56460
font_01_sfnt_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 18176 bytes
SHA-256: 2eae8e3987636c9fc65cc5a2ed4994fbbe9ecab828aa32e9f35a6bee3d4dd856

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