Malicious PDF — malware analysis report

Static analysis result for SHA-256 2159421e48c1ea93…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 13:42:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 99b86789fa49775a0418de3c5b628454 SHA-1: ac315ca012b9c2ee213b44cdadfd6044c5593f7e SHA-256: 2159421e48c1ea9318e5eb29fed6e6b9ed61061f1a8776aa42475f6327f7cada
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, many of which are part of a link farm designed to lure users with promises of game hacks and free in-game currency. The primary redirector URL, http://netcdn.tw/app/479516143/how-to-download-minecraft-java-edition-for-free-game-hack, is flagged as malicious. The document's structure and content strongly suggest a phishing or scam attempt, likely intended to lead users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/how-to-download-minecraft-java-edition-for-free-game-hack In PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-robux-december-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-robux-2021-august_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/roblox-free-robux-group-funds_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-free-spins-cheat-codes_GM406889139.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_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 21672 bytes
SHA-256: c5fb882b761dcb1a74d267f523cded19453f7f50632d229c0b7508c1ec8c71b6
font_01_sfnt_off00005fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 18856 bytes
SHA-256: 6547d261892dcf8681aa306c75aad1a1cdff9146f567b6b5237750e581ad9e61