PDF malware analysis — malicious · c808d05529165034

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 12:46:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 720f42ec4afd84e355f56e36868dd665 SHA-1: 7c6447eb4d2a06694fd7f803e1c65da53e313fb6 SHA-256: c808d055291650344fbf537216b053bed7cceee6c3277d3205c11b454c78f389

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector, that promise free game items or exploits. The document body explicitly mentions 'Get Free Robux Today' and includes the malicious URL, indicating a lure for a scam or to download malware. The presence of numerous links to external PDFs suggests a link farm designed to attract users searching for cheats or free items.

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/get-free-robux-today-game-hack In PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-roblox-exploit-no-download_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/roblox-dungeon-quest-free-upgrades_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-vip-admin-commands-with-all-permissions-for-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/robux-page_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
- https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/hackear-coin-master-android_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
`font_00_sfnt_off00003284.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3284	22812 bytes
SHA-256: `caf6a3e65eed798dd53b28503f26cc74c60001cbaf1d7fc50b06fafaa8651a76`
`font_01_sfnt_off00006510.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6510	19172 bytes
SHA-256: `3fdd240faf6e1407f7e3e305b0db49c456ea6d47955c0aeac931bfd374d9ce8c`

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