Malicious PDF — malware analysis report

Static analysis result for SHA-256 c180416ea8512634…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 02:44:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e84c2725c803888a0a385cb7251aacfb SHA-1: d3e13d1cff2a2ab631f3fc3440fc6c40d3a7091d SHA-256: c180416ea8512634c4a2a73dae0b6923efe572b5772d7fc2d8d299e8fcaa46da
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links and document body text promoting free game currency and hacks, specifically for Roblox and Coin Master. The primary link, http://netcdn.co/app/431946152/roblox-how-to-get-free-robux-promo-code-game-hack, is identified as a malicious redirector. This suggests the document is a lure to drive traffic to potentially malicious sites, likely for credential harvesting or malware delivery.

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.
  • 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.co/app/431946152/roblox-how-to-get-free-robux-promo-code-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/exosite-roblox-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/2021-free-robux-today-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-vip-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-account-login-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-rules-cheating_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-1-2021202100-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pokemon-go-free-yawn_GM1094591345.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-hack-100-works_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_off000030e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E2 21352 bytes
SHA-256: bba4610f11155290413ef7412e5694b6aafeb8ddf99888c26b84000ccf9f35db
font_01_sfnt_off00005f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8D 19648 bytes
SHA-256: da601dbeb02601c0a63632c65f4938d49ead1561ce3e1caf89b0f5fd2aedc400

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