PDF malware analysis — malicious · b796a7c6b3ec41c9

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 11:35:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 33db08863f2b99c5dc4e879f16a35550 SHA-1: aa390300e52137bee4a5af0ae769778689b34f32 SHA-256: b796a7c6b3ec41c99cb3009a133183ff700f884de496c1ae20da43f400aacc4b

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to redirectors and phishing lures, impersonating brands like Facebook and offering "game hacks" or "free generators". The primary malicious link identified is https://netcdn.online/app/406889139/coin-master-free-snacks-link-game-hack, which is associated with known malicious infrastructure. The document also suggests a password-protected archive, a common tactic to bypass security scans, further indicating a malicious intent to deceive users.

Machine Learning

Nyx PDF Classifier malicious score 0.9748

Heuristics 6

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.online/app/406889139/coin-master-free-snacks-link-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.online/app/406889139/coin-master-free-snacks-link-game-hack In PDF document text
- http://katalog.gemalibrary.net/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/getrobux-info_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/robux-giver_GM431946152.pdfIn PDF document text
- http://katalog.gemalibrary.net/repository/coin-master-free-spins-daily-fb-champion_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_off000052b8.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52B8	24360 bytes
SHA-256: `5c3804dacc2887e1ea66c9610bcd5a2989d55361dfbef35dc87aafa6aac2b452`
`font_01_sfnt_off00008a41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A41	2840 bytes
SHA-256: `30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37`
`font_02_sfnt_off000093f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93F4	17880 bytes
SHA-256: `09034ee7a1f9989932e9db65c2957a4d9f61d6fccc52a1ac5f57be2128ce07e5`

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