PDF malware analysis — malicious · 05fadbbab6449505

MALICIOUS

PDF

39.1 KB Created: 2021-05-23 22:39:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: b0bdcb258a6dab94a1642bf6ed2c5f59 SHA-1: 6ac54b88b1d1634bb1cc00c0e134182fb54d4d2d SHA-256: 05fadbbab64495052046201d370b9344a9910f4cd22d64c508035a789ec8db8d

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirectors, one of which is associated with 'free generator / game hack' lures and fake CAPTCHA prompts. The document body also contains text and links related to obtaining free in-game currency or items, reinforcing the lure. While no scripts were explicitly extracted, the presence of malicious redirectors and the fake CAPTCHA strongly suggest an attempt to trick the user into executing further malicious content or visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8060

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/835599320/how-to-get-free-followers-on-tiktok-game-hack In PDF document text
- https://pemadamapi.net/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
- https://pemadamapi.net/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
- https://pemadamapi.net/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://pemadamapi.net/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://pemadamapi.net/images/how-to-get-minecraft-for-free-on-phone_GM479516143.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_002_off0000387a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x387A	24052 bytes
SHA-256: `d8be169caf4246819bfb633d4c78e446d24c0f574897cf902279f609f2a21811`
`font_01_sfnt_off00006f88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F88	2840 bytes
SHA-256: `0ff7203f6678b3ce5cadf82d8d4ab75daf80d11355a5b436446d16072593a6f7`
`font_02_sfnt_off00007942.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7942	17692 bytes
SHA-256: `c8a0034b4012066e27b368389264813a3515151838273d971ed31104f84b04bc`

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