PDF malware analysis — malicious · 4cfa5c8f902916c2

MALICIOUS

PDF

42.5 KB Created: 2021-05-10 18:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: d16bfc095f2ac4a1ceca362f78237914 SHA-1: d93ae742e075fc59bd63be54d931e7c1fb225e44 SHA-256: 4cfa5c8f902916c2e6d427611bc0256c6e50d53afde74617e6197015670a2c2e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that offer "free generators" or "hacks" for popular games, such as Coin Master and Roblox. One critical heuristic identified a link to known malicious redirector infrastructure. The document body also contains a direct request for recovery secrets or private keys, indicating a phishing or credential harvesting attempt. No scripts were extracted from this sample.

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.
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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/free-coin-master-coins-and-spins-game-hack In PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-skin-free_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-script_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/code-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
- https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hacks-for-pet-food_GM406889139.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_off00004d5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D5A	24112 bytes
SHA-256: `8a54b785cdee84a16422148fba8a03f26a484825aa3fafdab3c3993ea6b28f5b`
`font_01_sfnt_off0000844c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x844C	18060 bytes
SHA-256: `11bd500b33c169b65e53ecddb4cd7ac7428d9a9bdc32d60ba78f45c9260aee9d`

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