PDF malware analysis — malicious · 3bd5d22c991fa6c3

MALICIOUS

PDF

41.6 KB Created: 2021-05-20 21:41:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 4d17bb7c58bff5c35324875b6d5f563f SHA-1: ccc25fc95055c88a63911650f4822fdda98e5630 SHA-256: 3bd5d22c991fa6c3c8d624d3b7a5e80b3cb249dbc0aaf8937d8556a7219af4bc

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to a malicious redirector disguised as a "free generator" or "game hack". The document body and heuristics indicate a social engineering attempt to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.8053

Heuristics 4

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.
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/835599320/free-tiktok-likes-no-human-verification-or-download-game-hack In PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off000030c6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x30C6	24448 bytes
SHA-256: `63e523fe87dcf95f17a0429f569c5bfce5f8a954f15e4bc4ac0fafef05598a72`
`font_01_sfnt_off0000683c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x683C	3488 bytes
SHA-256: `26adc90609e97083bfd70eb31f302d35e7487faeeb734eb0326f3549d8542477`
`font_02_sfnt_off00007422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7422	3120 bytes
SHA-256: `49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca`
`font_03_sfnt_off00007f35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F35	18796 bytes
SHA-256: `3d40c2c610592f010e994df70d6dca89d92a7e9c48723e1cae8d3a563b12c301`

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