PDF malware analysis — malicious · 18c0142fc78d1913

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 03:39:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 0ead1616836f3603fa1e314d885192d2 SHA-1: c300441538e0a25adee48d6a93c8b682b6681994 SHA-256: 18c0142fc78d1913530bee87920d46842384fd74e045f62dd8aaeba36d8ca304

228 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks or generators. These links redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a phishing or scam attempt, likely to lead users to potentially unwanted applications or further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 6

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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-get-free-adminon-all-roblox-game-game-hack In PDF document text
- https://fridaytravelnepal.com/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/games-in-roblox-with-free-radio_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/coin-master-apk_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/kachifpro_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
- https://fridaytravelnepal.com/userfiles/files/roblox-cheat-robux_GM431946152.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_off00005291.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5291	24300 bytes
SHA-256: `4c902ddbd13f4ce452bc978b752ec40862a9811884cda86ec145d7b29c072840`
`font_01_sfnt_off000089e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89E3	2940 bytes
SHA-256: `eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a`
`font_02_sfnt_off000093f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93F3	18996 bytes
SHA-256: `d5699387314579d98bd634082beaee758e3cd64f4898cce38b3b206753e0d57a`

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