PDF malware analysis — malicious · e86aabc9319455f7

MALICIOUS

PDF

55.7 KB Created: 2021-05-11 05:05:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 8737253b1fc7203a49da221f9c3d1a81 SHA-1: 32e1d5eb1cf211cb68adf9e8cbb3c5e824198f65 SHA-256: e86aabc9319455f77b6147623666e8b11b504fc3afaff7cb71693686ec8e54ce

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with a fake CAPTCHA, suggesting an attempt to trick them into visiting malicious websites. The primary link, https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-link-game-hack, is presented as a 'free generator' or 'game hack'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or social engineering attack, likely leading to further malware download or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.8407

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.xyz/app/406889139/coin-master-free-coins-and-spins-link-game-hack In PDF document text
- https://www.ucc-today.com/uploads/files/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/roblox-money-hack_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/claim-roblox_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
- https://www.ucc-today.com/uploads/files/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004dca.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DCA	26060 bytes
SHA-256: `83497eb45e3c110589099a84402c6e5d6e16b52df41599715de0e7a58ba8400f`
`font_01_sfnt_off00008ae1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AE1	3088 bytes
SHA-256: `e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222`
`font_02_sfnt_off000095ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95AC	7960 bytes
SHA-256: `cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2`
`font_03_sfnt_off0000a8d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA8D1	18228 bytes
SHA-256: `b9853edf503a53d442d3b577c09c09d59d7c57f52c57bf669c9991918f7be207`
`font_04_sfnt_off0000caa8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAA8	4272 bytes
SHA-256: `fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0`

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