PDF malware analysis — malicious · 9e2fcfc61abb77e5

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 05:00:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 3c6e8485c2e3077b39deed3ccd36a805 SHA-1: 513e3ed4e4620081b6725846e4a9aaff4b0074d9 SHA-256: 9e2fcfc61abb77e5229d16d9139530071a636272dac8bc2e06c291d95369669a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and websites offering game hacks and generators. These links are designed to lure users into clicking them, likely leading to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/google-roblox-games-game-hack In PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/free-roblox-followers_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/www-coin-master_GM406889139.pdfIn PDF document text
- https://nhadatinfo.vn/upload/ckimage/files/robux-withdraw_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_off0000471c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x471C	27664 bytes
SHA-256: `5a37d20330c58a4532ac4ac33db204a08ce67ee783186d92b01dcc48b34ab60c`
`font_01_sfnt_off00008825.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8825	18560 bytes
SHA-256: `0fb1d19a9ce31739a953e5696a177f7c2cbb3bd8fcc5147d812294bb20adc511`

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