Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10d57d42659a7a5…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 15:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 63857508b3ab500a83263e99d4622b49 SHA-1: 2660e6c3c0d3a3d95ed2e05be1672413d463acd7 SHA-256: d10d57d42659a7a583a1d95f998f218b24f72242fb1198275db1ba478538e18b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game items or accounts. The primary link, http://netcdn.tw/app/431946152/free-roblox-accounts-with-builders-club-game-hack, is designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

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/431946152/free-roblox-accounts-with-builders-club-game-hack In PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-promo-codes-2021-december_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-how-to-get-clothes-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/pubg-uc-shopee_GM1330123889.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-free-black-suit_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_off00002ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC3 22172 bytes
SHA-256: 9491d466469d977604033f4ab6f5931efa765eb8c4814987fc1abdc347ffb12b
font_01_sfnt_off00005fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 19552 bytes
SHA-256: b1eb7f5cc000dbd6647d8142d7b5a18728747fb2d8c014d369b8d8e037db6dcf

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