PDF malware analysis — malicious · a6c614823d8340c9

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 20:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 4b0363d382af5c0f295fa6b695b195c6 SHA-1: 5596bab0429d0bd100253e3feb5c8f2b617fc186 SHA-256: a6c614823d8340c9fc9ee20c0fd8c9e0956178cbbc09830d6f33f2942d84ab96

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as game hacks and generators, designed to lure users to malicious redirectors. The primary redirector, http://netcdn.tw/app/431946152/roblox-free-no-download-game-hack, is flagged as malicious. The document body and heuristics indicate a mass link farm intended to drive traffic to potentially harmful content, likely for ad fraud or further malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/roblox-free-no-download-game-hack In PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-on-roblox-ohantom-forces_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/rewardrobux-com_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-robux-by-bananaman-2021-world_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/cone-master_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/shadow-raid-loot-cheats-roblox-notoriety_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-rb-world-hack_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/hacks-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-free-pets_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-roblox-bloxburg-builders_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-roaming-camera-roblox-script_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
- http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-can-i-get-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
`font_00_sfnt_off000031bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31BF	21724 bytes
SHA-256: `de729cdb811652d29395392aaa82dcb8b77baea206b78a42a5408c58f2f8fceb`
`font_01_sfnt_off00006199.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6199	19156 bytes
SHA-256: `ba179ae70ead152b01ae8f27451fe6f8d609efa6e1c0129b35fe0e54807ded44`

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