PDF malware analysis — malicious · 43b4b164cf4c85e6

MALICIOUS

PDF

48.5 KB Created: 2021-06-10 17:26:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 709f25cd284402ac8db1d4650d599338 SHA-1: 3037fbc4d243cd2dd40a7dd8b4f575e2d5b63a44 SHA-256: 43b4b164cf4c85e658a42a145c4e1f4841f1e61f464f901bc0403bd49d4264ce

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/how-to-hack-roblox-games-2021-game-hack, which is associated with a critical heuristic firing for malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack, likely intended to lead the user to download further malware or compromise their credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-hack-roblox-games-2021-game-hack In PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/fake-gps-pokemon-go-free_GM1094591345.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/roblox-jailbreak-glitch-through-walls-hack_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/pokemon-go-free-stuff_GM1094591345.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-level-9-exploit-roblox_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/get-free-spins-from-coin-master_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_off000053c7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x53C7	25476 bytes
SHA-256: `07e2d72a2cf569cff78db3add5d8889cdbff05c710bcfcce32140b44a47b2a4d`
`font_01_sfnt_off00008e9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E9D	2832 bytes
SHA-256: `77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2`
`font_02_sfnt_off0000984e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x984E	19008 bytes
SHA-256: `54185099cc4abbf44b659913d751f0abcfae5b4a0a2fe836ec4e1151ba78df66`

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