PDF malware analysis — malicious · 417de07d9cac4caa

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 23:20:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 9345d1526b95961ee159898e372bf538 SHA-1: cd94520d4ffbb1337c19aae523e9094de6bfe079 SHA-256: 417de07d9cac4caae0b87c4cbd4d0f2c2216bb50605e8b4002c64f6abb2f5799

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple links to redirector infrastructure and impersonates Amazon to lure users with the promise of free Robux. The primary malicious link identified is https://netcdn.tw/app/431946152/how-to-get-robux-for-free-without-builders-club-game-hack, which is associated with game hack lures and credential phishing. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-get-robux-for-free-without-builders-club-game-hack.
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-robux-for-free-without-builders-club-game-hack In PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-map_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-robux_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.

Filename	Kind	Source	Size
`stream_004_off000050a2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50A2	26352 bytes
SHA-256: `ae4102d06dd7065fc4d064acf49b2aa8736f68e726b159a7a8e3d5d80897ffab`
`font_01_sfnt_off00008c0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C0F	19016 bytes
SHA-256: `8b2d504d038c641419c3c15a0dcc4794d7ab26e27bbe4d6773b80d76780aab00`

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