PDF malware analysis — malicious · d6c92af973862712

MALICIOUS

PDF

46.9 KB Created: 2021-06-07 16:45:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 47db60ef196dcaf875b9d65648493d67 SHA-1: 28927e6bbf84005054044f7bf20a7486874c0e1f SHA-256: d6c92af973862712519b2ab6a6c2b3783ed9e6429b68d4b894f38a42e3a371ec

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of "free game hacks" to direct users to malicious redirector infrastructure. The document contains multiple embedded URLs that point to potentially malicious or unwanted content, including a primary redirector. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings suggest a phishing or social engineering attack aimed at leading the user to a compromised site or download.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-get-roblox-animations-free-game-hack In PDF document text
- http://achauco.vn/public/upload/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
- http://achauco.vn/public/upload/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/hack-robux-ohne-cheat-engine_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-hacked-client-112-2_GM479516143.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005179.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5179	28116 bytes
SHA-256: `c914d05b517b1f9e4044c88308705e71b0f88a664446c32f069e77ada5fda515`
`font_01_sfnt_off00009346.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9346	18824 bytes
SHA-256: `f9420ee98d994524bfdc665d1b48c70b624ff0f4ed1c1d78438af68fb4b50d59`

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