PDF malware analysis — malicious · 10f855dff88bc0e8

MALICIOUS

PDF

34.3 KB Created: 2021-07-19 21:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 7c26649ff3a52939da682b6b5048ecaa SHA-1: 6b994992ecf41b96475750a0c19736af1f4ddc1e SHA-256: 10f855dff88bc0e891f9989a1152776b05fe7f2a6ce21ba9388916c70d116a3f

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/roblox-com-free-robux-game-hack. These links are presented as a lure for free game currency (Robux) and are designed to redirect users to potentially harmful content. The document body and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 4

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.
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/roblox-com-free-robux-game-hack In PDF document text
- http://www.rewaqousha.net/userfiles/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/free-minecraft-website_GM479516143.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
- http://www.rewaqousha.net/userfiles/files/robux-matchcomfree-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
`font_00_sfnt_off000030b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30B6	22740 bytes
SHA-256: `928cda6e8cc69944266df91473202136b08cb51a971546de131b72947c8e231b`
`font_01_sfnt_off0000637a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x637A	18536 bytes
SHA-256: `8bd8f79a3d85335837704a41a1f8010889ce781331cd4cec55e8058680d5a9b8`

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