PDF malware analysis — malicious · c41d797f8910b1c1

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 04:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: c69cc5e36785a25ba010e5d262638dec SHA-1: dfaf42fbd91e7425c482fe0c9131aa5dae82a2a5 SHA-256: c41d797f8910b1c1d97918be1c8c22dbf7ebf557944ae312b4634b89ba2a285e

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a brand-impersonation lure, specifically Facebook, to trick users into clicking a link for 'free generator / game hack' content. The link directs to a known malicious redirector infrastructure, indicating a phishing or credential harvesting attempt. The document's content and embedded URLs strongly suggest a social engineering tactic to compromise user accounts or deliver further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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: http://netcdn.tw/app/406889139/coin-master-free-gifts-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 http://netcdn.tw/app/406889139/coin-master-free-gifts-game-hack In PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-800-robux-codes_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/mascara-de-hacker-en-roblox_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-get-free-girl-clothes-on-roblox_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/get-robux-no-hack_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-free-builders-club-account-generator_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-cracked-roblox-accounts_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/good-hacking-site-for-roblox_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/a-free-robux-gift-card-number_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/earn-robux-websites_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-redeem-code-robux_GM431946152.pdfIn PDF document text
- http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-roblox-clothes-for-your-avatar_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_off000031f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31F9	22544 bytes
SHA-256: `d5b5d8102142a281cefd22853e97d911d7e72a451434ebf1252aa2129a7ff315`
`font_01_sfnt_off00006446.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6446	17996 bytes
SHA-256: `0554876b2ab95b57b2a8903cbabfbfa90e4f9f04422ab63317bc25d957b52972`

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