PDF malware analysis — malicious · 36983ffc3467e428

MALICIOUS

PDF

33.4 KB Created: 2021-07-09 10:10:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 536ad67f34d7cfc260780a07ceb34335 SHA-1: 4b27689e1f24c2924ef4b127e1189df8b2c0b66b SHA-256: 36983ffc3467e428fa6ad83ee09296415a4ebc368b57a85b9538b6273a5bbbdb

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at users interested in popular games.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

Heuristics 4

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.
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.tw/app/406889139/coin-master-free-spins-link-deutsch-ios-game-hack In PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-inspect_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-robux-working-with-proof_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-download-roblox-pc-virson_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-google-free-kostume_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/speed-hack-roblox-cheat-engine_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-death-sound-free-download_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/flamethrower-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-free-download_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/money-hack-roblox-pizza-place_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/always-day-hack-for-roblox_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-script-executor-level-7-free-download_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-clothing-hack_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-robux-for-free-com_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-cheat-on-roblox-giant-dance-off_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_001_off00002c91.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2C91	22572 bytes
SHA-256: `e141987b384f45274ffe13b100ae08984aaff9e377547c91053984b7f6869331`
`font_01_sfnt_off00005ee2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EE2	18820 bytes
SHA-256: `0df7f73f5dc751554d445504aa4a2634324aac68e74bdfd62cfd74053bcb9575`

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