PDF malware analysis — malicious · 7c88657123888b99

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 02:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 9b3010ada95db7c2021947a77f0b4675 SHA-1: 36032cc50226ed6abead25f2d89bf1833611e931 SHA-256: 7c88657123888b992af3c94f0c870c7e2cb5370e9cc7820bf63d09138cc8bd79

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. This link, https://netcdn.xyz/app/406889139/pro-free-spins-coin-master-game-hack, is designed to trick users into clicking through to potentially malicious sites. The presence of multiple embedded URLs and the ML classifier's high confidence further support the malicious nature of this document, likely serving as a lure for further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/406889139/pro-free-spins-coin-master-game-hack In PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/get-robux-com_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/claimrobux-net_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-robux-no-email_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://coinmasterspinandcoin.comIn 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_off00004b81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B81	25244 bytes
SHA-256: `284ab8b99ea989b4728a0fc5e0046b33b39684c6fe6492546845224fb390c946`
`font_01_sfnt_off000084ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84AE	18040 bytes
SHA-256: `f9cfd09f1f0adcfb05f49f46170915efea321752292d644bf66086fa9d05ce61`

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