Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74e36dce33d7111…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 15:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9eaf0c605a7adbf5269d5ecc77aa4c5a SHA-1: a2b3272a3de783c62d84db7a39b3818051b06281 SHA-256: c74e36dce33d7111013904262307825801935528349b52ba20f7784193e5f8fb
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure for free in-game currency or cheats, often used to mask malicious redirects or downloads. While no scripts were explicitly extracted, the nature of the links and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic suggest the PDF is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/coin-master-links-that-don-t-expire-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-ben-10-universal-showdown-cheats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-account-with-rpbux-password_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/my-boyfriend-cheated-on-me-with-his-ex-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-robux-generator-bc-only_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/would-you-get-banned-from-roblox-if-you-hacked_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/check-cashed-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-server-shutdown-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-alts_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacker-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-x-ray-hack-autohotkey-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-april-fools-hack_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
stream_002_off0000358b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358B 23076 bytes
SHA-256: a8a6aae7b8fdaa0f45ada5d85e5690bdf7e5d8ac678d12649cf3acd686c55ecd
font_01_sfnt_off00006958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 18724 bytes
SHA-256: 0bc74d52f75a1104db5e4695d05e5addd24de774456fb5db8c3829ae8d2508b3

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