PDF malware analysis — malicious · d84518a443cccb63

MALICIOUS

PDF

49.5 KB Created: 2021-06-02 06:29:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 9dbfa090db0c9bc9fddb7a041445f926 SHA-1: 5bc98d11b89b28f72c653a27697b8d7a69c0a94d SHA-256: d84518a443cccb63f44b51ba033052d2590abdfd541e3d2aca722229330f014e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, including one for a 'Roblox Cheat Robux 2021 PC Game Hack'. The document body and heuristics indicate a lure to trick users into clicking these links, likely for further malware delivery or phishing. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.xyz/app/431946152/roblox-cheat-robux-2021-pc-game-hack In PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-rape_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-daily-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
`stream_004_off000052ad.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52AD	26540 bytes
SHA-256: `3a072c7f50e3cf4f6b3b73f2eeb0993183d7bcc46099990697c67e3d8532f2cb`
`font_01_sfnt_off00008f62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F62	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009c74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C74	18980 bytes
SHA-256: `cc4da26ad16e16436ede96a8e55d0cde59e23b1e0f7270186b4fe105794c614b`

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