PDF malware analysis — malicious · d528152b9c2c05f3

MALICIOUS

PDF

46.2 KB Created: 2021-05-14 04:00:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 73a7622112de569146a1b1b84ccc0323 SHA-1: 74ff3f3af730958d3af84e83aee638dfa3d8beb0 SHA-256: d528152b9c2c05f3d393e975d622cff86726a17802864eceb44ccb8a40453fda

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, masquerading as "free generators" or "game hacks" to entice users. It also displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. The embedded URLs suggest a phishing or scam campaign aimed at driving traffic to potentially malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/406889139/free-coin-and-spin-in-coin-master-game-hack In PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
- https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-generator-no-verification_GM431946152.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_003_off00004e9b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E9B	26364 bytes
SHA-256: `5289c556c9ba89ed60a18e92b5c36fbd26ceda0da8a76c8b22bb8e7b744119d9`
`font_01_sfnt_off000088f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88F9	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off000092ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92AB	18060 bytes
SHA-256: `e7e0a884e59d6d4457fb90cba238d6b772cb21bcfadc79e96e95c97f919ce424`

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