PDF malware analysis — malicious · fcf1ea9914ccc5f9

MALICIOUS

PDF

36.6 KB Created: 2021-07-04 08:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: f188479feaa36a92f5e172b572d6957d SHA-1: 6ca6dc781a0674121cc1b1899e9f0222ec44d86f SHA-256: fcf1ea9914ccc5f9b44dafe55e5e1b0e992e3487f1fc6bea98412c1efe080ff7

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/hack-coin-master-app-ios-game-hack. The document body and heuristics indicate a lure for game hacks and generators, suggesting a phishing or scam attempt. The presence of embedded URLs and the nature of the links point towards a social engineering attack designed to redirect users to potentially malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
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.
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/hack-coin-master-app-ios-game-hack In PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/202100-robux-hack_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-robux-links_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/como-hackear-a-un-amigo-en-roblox_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-hoodie-t-shirt-free-shipping_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak-free-vip-server_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-in-roblox-after-patch_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/pastebin-unlimited-free-robux-and-obc-on-roblox-2021_GM431946152.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
`font_00_sfnt_off0000367d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x367D	23896 bytes
SHA-256: `90a75a118a2609274dd8c6aefe976321fb63fe04d90f475c932749394212e398`
`font_01_sfnt_off00006cc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CC9	18180 bytes
SHA-256: `92885cdb40844dabedcd789cc0fdc1dae3095a00aebbb69c69b4668ac08d7e62`

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