PDF malware analysis — malicious · 9bbdd46d6fda69df

MALICIOUS

PDF

48.0 KB Created: 2021-05-14 15:08:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 0e5ffb3e35e6a386267c08d357c5fa11 SHA-1: 42e6f1379a4917930efc7f238aab9dd98fcc8ecb SHA-256: 9bbdd46d6fda69df62dd4aa125b8341ceb83307150cba48257787be7ccd959fc

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one that redirects to known malicious infrastructure, disguised as a 'free generator / game hack'. The document body and embedded URLs promote 'free Robux' and 'coin master hacks', indicating a phishing or scam lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/get-free-robux-info-game-hack In PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-level-3_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/is-free-robux-real_GM431946152.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
- https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/hack-roblox-players_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_003_off00004d2b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D2B	29312 bytes
SHA-256: `6f3a9983f42701eaed9bea41bb716ccf967a0009ea7287d447cfb278c1a1d3d0`
`font_01_sfnt_off00008f3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F3D	3016 bytes
SHA-256: `4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd`
`font_02_sfnt_off000099a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99A0	18120 bytes
SHA-256: `6e6e8bb7c0e640fc67837f70826b1bbd381eb05acf75ec047415621944091573`

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