PDF malware analysis — malicious · b1a38b5e83297b69

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 09:19:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 17d6ea471dc0ac29f5425ed42e9f8374 SHA-1: 05ce4556a8b06bfc098f473cc65eca5f6cee22c6 SHA-256: b1a38b5e83297b69aad5d4bce59cc2bfd5a97415332ddf0115583fae24fbf0b5

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users into clicking on game hacks and generators, such as 'roblox-robux-generator-game-hack'. The presence of multiple redirector links and a high ML classifier score indicate malicious intent. The document likely serves as a lure to drive-by downloads or further phishing attempts.

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 https://netcdn.xyz/app/431946152/roblox-robux-generator-game-hack In PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
- https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/google-how-do-you-get-free-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
`stream_003_off00004a4a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A4A	29032 bytes
SHA-256: `a0558f432ec49478e43a522909d4097099a9cd3a1ec67c15326d4a2f222e1961`
`font_01_sfnt_off00008d50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D50	18256 bytes
SHA-256: `5ee160adc2cd2b50f67dfe0d7652360e6cad44731d7ae2e4db544c54b4fa7397`

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