PDF malware analysis — malicious · 9caae23ed266201b

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 00:41:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: f4c302f51b98654a4b871906227c1a70 SHA-1: c7b9352c86a4d7eb767afdee6ee75366c5f3a5ac SHA-256: 9caae23ed266201bb58c131d51e1364f22dbe85e7108c79ccc9dd340023ef108

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with a fake CAPTCHA prompt, suggesting an attempt to trick users into downloading further malware or engaging in scams. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-today-2021-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent, likely related to initial access via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/coin-master-daily-free-spins-link-today-2021-free-game-hack In PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/easy-roblox-today_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/haktuts-free-spins_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-heaven_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
- https://coinmasterspinandcoin.comIn 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_003_off00004bdc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BDC	24872 bytes
SHA-256: `406b75b013e5c69c2c98ab8a10a66afc3f1ad657500f83577d3dbd9a6ee84027`
`font_01_sfnt_off000083ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83AC	19052 bytes
SHA-256: `51ec1fd699785aa8f843f12306ac352f9679003eb9b4544ea09afbac11be1d71`

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