PDF malware analysis — malicious · d0510613717f24fd

MALICIOUS

PDF

46.3 KB Created: 2021-06-02 23:03:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 440dc1df3f44e03b87cb93c104d5d68e SHA-1: 7a20ef8c2d92ce32d2c971bb920949341c1879ce SHA-256: d0510613717f24fd8518da3620f620c808b1c9a4a501eb61fbc61b85bb64cf9a

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'free Robux' and impersonates Microsoft to trick users into clicking a malicious link. The link redirects to infrastructure known for malicious activity and is associated with credential phishing. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/claim-free-robux-obby-game-hack.
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/claim-free-robux-obby-game-hack In PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
- https://rblx.landIn 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_004_off00005466.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5466	26000 bytes
SHA-256: `ead594d2ac258e9012d31485d9d586ed148ef49b69ffa98c9c27a22c84194081`
`font_01_sfnt_off000090b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90B0	18876 bytes
SHA-256: `c83574afa04291054e7b90b25e5319572ce77fbc048e4f984da24d44f46b7d0a`

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