PDF malware analysis — malicious · 0c43a1a79f478624

MALICIOUS

PDF

34.7 KB Created: 2021-07-19 09:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 93ad369b6cb4ac837924e8e83506568b SHA-1: db65a6d25010cffc62294ba8fca02802e1766016 SHA-256: 0c43a1a79f478624cbe351d02cb7f20c0986ee19e71841f75562b325377c01cd

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The primary URL points to a site offering a 'Coin Master Free Spins and Coins Generator', indicating a lure for game-related cheats. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to redirect users to a malicious download or phishing page.

Machine Learning

Nyx PDF Classifier malicious score 0.9962

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 http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-blogspot-game-hack In PDF document text
- http://magistrinfo.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/tiktok-fans-free_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-pe-free-ios_GM479516143.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_off00002eb4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2EB4	23840 bytes
SHA-256: `bf18641f91e38cf4fa1ae34cb5d6b65445f250a39dad81ae292569c379a3b0d8`
`font_01_sfnt_off000064d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64D5	18636 bytes
SHA-256: `0f54115b9972647639797d248389657ce322f7c5c12f639c73d71ff235a73201`

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