PDF malware analysis — malicious · 44bf19e0f7010946

MALICIOUS

PDF

35.6 KB Created: 2021-06-30 11:24:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 09244323d36b2e99b1b9938fc4973c0b SHA-1: 31ba46baa9a581ed7f7e68493e7245dae37c8f4b SHA-256: 44bf19e0f7010946629276d2027fcb8cf2ab455d1fd37ed041c2a870a4f4d1c8

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game hacks and items to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which in turn hosts multiple other malicious PDF files. The presence of 'cmd-juegos-hack-roblox-2021_GM431946152.pdf' suggests potential command execution or exploitation, likely leading to further payload delivery.

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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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.co/app/431946152/roblox-spiderman-shirt-free-game-hack In PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-tower-battles-hack-script-2021_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-hack-scripts-exploit_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/proxo-cheat-roblox_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/comandos-cmd-juegos-hack-roblox-2021_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/infinity-gauntlet-roblox-free_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-click-teleport-hack_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/free-supreme-shirt-roblox_GM431946152.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-cheats_GM406889139.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
- https://elearninIn macro / runtime command snippet
- 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_off00003225.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3225	22720 bytes
SHA-256: `54a5201cfd97786e347e49621128ba1f7e54686f9d9a6d2c7d16cc4ba4469425`
`font_01_sfnt_off0000649e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x649E	19652 bytes
SHA-256: `72a2c1b40f7e11aca2122a6dcd3dea124db980165e70791343c8986389807b4d`

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