PDF malware analysis — malicious · 89e197e01c4a83aa

MALICIOUS

PDF

43.9 KB Created: 2021-05-13 15:43:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 57b249739a831c296dc223e0073f1558 SHA-1: 29b5a685627e72155e25ebfcb753201024cc0019 SHA-256: 89e197e01c4a83aa4d250f097c652d58a131dddfc45d9b5a8e598ec1bb2a3abd

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links designed to lure users into clicking on them, disguised as 'free generators' or 'game hacks'. The primary link leads to a known malicious redirector infrastructure. The document also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The presence of a 'password-protected archive handoff' heuristic indicates that the document may be intended to trick users into downloading an archive that requires a password, likely to bypass security scans.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 6

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/free-robux-no-gift-card-game-hack In PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/www-robux-com_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_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_off00004ac2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AC2	26620 bytes
SHA-256: `e5b3781687c35df25b2a112f20bdac453162d18a400a9d8022d5ba00b6b2f5da`
`font_01_sfnt_off00008839.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8839	18640 bytes
SHA-256: `5e2a3e67d4e6faa48e47b93c69738121aad1fd6f7e815cfd3538255806571323`

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