PDF malware analysis — malicious · 2f771c9b5304838e

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 06:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: aa807a6c1f82cf29269f9afb57c54d6f SHA-1: 8a358f6581a092d7794f9b284eb59ac0d9f84b2d SHA-256: 2f771c9b5304838e124f59df5bf1c322ff31e0482df68b0ea4b955d7c062ccff

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free game-related items. The document body, though partially corrupted, contains references to 'free Minecraft Gift Codes' and a URL that aligns with the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/479516143/free-minecraft-gift-codes-game-hack In PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- http://www.perpustakaan.smansa-bdl.sch.id//repository/how-to-change-your-username-on-roblox-for-free-2021_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.

Filename	Kind	Source	Size
`stream_004_off00005824.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5824	25484 bytes
SHA-256: `3748935d8eff9b38e6931ec18b7c7294cc510faf88cd5343587c4567b5bd968f`
`font_01_sfnt_off00009244.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9244	3092 bytes
SHA-256: `1aa0e4457f2fdbd20c643bc065edafaa683fd9dc2930c01c4492bce0fd9a7f02`
`font_02_sfnt_off00009cf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CF0	17884 bytes
SHA-256: `7ec61a924c6d9821aca9f66af1070d56701b2b51a1f7faab5d7237cf03dbe1ad`

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