PDF malware analysis — malicious · 199578fceee3c8da

MALICIOUS

PDF

37.2 KB Created: 2021-05-23 12:47:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ec493bbf6845010e86154b9e869ee16c SHA-1: a25b57ddf25336ffcbcf2b411daeea7fcadecb70 SHA-256: 199578fceee3c8da5b22c3ed8de44fb664fb5ae5f11057227c0e3a80de8650c3

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links and visual cues designed to trick the user into downloading or accessing content related to games and hacks. One critical heuristic identified a link to known malicious redirector infrastructure, specifically pointing to 'https://netcdn.xyz/app/479516143/minecraft-free-download-android-game-hack'. The document body, though partially corrupted, also contains references to game hacks and download generators, reinforcing the lure. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9447

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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/479516143/minecraft-free-download-android-game-hack In PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/pokemon-go-free-friends_GM1094591345.pdfIn 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_002_off0000349a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x349A	25892 bytes
SHA-256: `bf1643ee8cf3d6112e3f4b8e86ea9cd883344bbdd53792b8ca0cffaac1bb1703`
`font_01_sfnt_off0000703a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x703A	18292 bytes
SHA-256: `9d9b0ee832c8ed03a3e8d039feca9f5c484872876758be0788389d8bcd5131f0`

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