PDF malware analysis — malicious · 2dbcdf1cdec43869

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 11:12:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 32b5b1956a7dbf013b1d139c5f403647 SHA-1: affc2826e523760ed6060f0fbb51792d22f97c21 SHA-256: 2dbcdf1cdec438693d8d527d37d59083b95fc29d2a28b115cb2d6a0dfc33fa1d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to websites offering game hacks and free items, which is a common tactic for distributing malware or conducting phishing. The heuristic firings indicate the presence of malicious redirectors and a link farm, strongly suggesting a malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/roblox-install-free-game-hack In PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/hack-client_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005245.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5245	27692 bytes
SHA-256: `c521566d12115ab2c81c7e9382aa8daa6c934ad14639287b0f80b0a5825370bc`
`font_01_sfnt_off00009170.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9170	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009e82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E82	18280 bytes
SHA-256: `3c3a3b9ea50be1288d4e90d28d6823d5d0e7fce454efe1523ba787caa6fa0fc3`

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