PDF malware analysis — malicious · bf34b3bacaa2a372

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 23:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 25f0df399ac474ff9709127f7d023aab SHA-1: 85aae10aea77ec61bab52fbd30056761e9561b4a SHA-256: bf34b3bacaa2a3727552ee4e3ba448561c487ac05573d777da86b6ff17249aac

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking a link. This link, 'https://netcdn.xyz/app/431946152/roblox-hack-client-game-hack', redirects to a site offering game hacks. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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.
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
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/431946152/roblox-hack-client-game-hack In PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.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_003_off00004afc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AFC	26020 bytes
SHA-256: `6559d05731d0880354f7e880f0cf3a75cb82de918b87f633c299e580471f4315`
`font_01_sfnt_off000086cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86CC	18408 bytes
SHA-256: `550f62bb1f49814ef42b1b735b63b4edf215944f9d7482118736a3d91d594bfc`

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