PDF malware analysis — malicious · 79434e6b144cbf54

MALICIOUS

PDF

44.9 KB Created: 2021-05-11 17:32:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 14da1e73aeb5c89a06879bebf2f5d872 SHA-1: ea7b07131d2f2cb6fe22831ce226bbba212b736b SHA-256: 79434e6b144cbf5450a9ef7fa089248f53186d618771675f848892bccac78f2f

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and game hack lures, indicating a phishing or credential harvesting attempt. The document body and embedded URLs strongly suggest the intent is to trick users into visiting malicious sites, likely for financial gain or to deliver further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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/coin-master-free-spin-reward-links-game-hack In PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-free_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/robux-website_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/easy-robux-hack_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/hack-master-coin_GM406889139.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
- http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.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_off00004c5b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C5B	23856 bytes
SHA-256: `67361acd262ed5e765804696e8cf9be6c64caf598e61dc451f75341c350b6c00`
`font_01_sfnt_off000082ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82AD	2884 bytes
SHA-256: `4d5450ce7e6d7db995ea7e6ffcd90efeba3e66825e548aa429b230fb003c0574`
`font_02_sfnt_off00008c8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C8F	18396 bytes
SHA-256: `b3a11fba1cb2f700afeb24321b2748de206350cd68cebaac90114e68d657d658`

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