PDF malware analysis — malicious · ca5bfb56fbe85644

MALICIOUS

PDF

49.6 KB Created: 2021-06-08 17:33:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 9d237622306080815c559fd2a76e5d40 SHA-1: 1e532f40d7df1686ec06e430dff421c2f472af07 SHA-256: ca5bfb56fbe85644b6ced206d834afa88b0533be4209214cae86265ef934d608

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document presents a fake CAPTCHA to lure the user into clicking a link. This link, identified as a malicious redirector, leads to a "game hack" generator. The document's content and heuristics strongly suggest an attempt to trick users into downloading or executing further malicious payloads, likely through the provided URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/calu-hack-for-roblox-jailbreak-game-hack In PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/master-coin-free_GM406889139.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/instant-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
- https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/pixies-gigantic-coin-master-free-spins-and-coins_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_off000052c4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52C4	26416 bytes
SHA-256: `140b5e62fa28c0fb6150f48279b3b7546bfb3078c5e28a43b3e357c6866adcbe`
`font_01_sfnt_off000090d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90D6	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009de8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9DE8	18772 bytes
SHA-256: `f3cbfba905eb19ca7890413727b173a30b7b90be001ec47fcce661e8c4e8b92e`

Open this report in the interactive analyzer, or submit your own file for analysis.