Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a7c7d87283e05c…

MALICIOUS

PDF

47.6 KB Created: 2021-06-07 09:49:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a61b0feba9896c8287502fce3903eb66 SHA-1: 712087c9e7393915245c340be7ad0f002cfcb976 SHA-256: 22a7c7d87283e05ce2a512c7c830d7506a5c419cbe5172d4b98f5db29c9c2eb8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and hacks to entice users. It contains multiple links to known malicious redirector infrastructure, including the primary URL 'https://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-2021-october-game-hack'. The document body, though partially corrupted, also contains this URL, reinforcing the malicious intent. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 3

  • 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.
  • 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://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-2021-october-game-hack In PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D2 26084 bytes
SHA-256: c306a535409b34c43901b2151624409f8cd698b779d6cef2a6c6b903f9fac91f
font_01_sfnt_off00008e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E68 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000984d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139