PDF malware analysis — malicious · ad4615c8b1846000

MALICIOUS

PDF

42.7 KB Created: 2021-04-30 20:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: f30c3443fe13fb76fcc045fd4747cd29 SHA-1: 576d6ea4f839c6ef74409afe2dd082d60a82184c SHA-256: ad4615c8b1846000b333441be1fa3e1baa3fd34b26ad70a88e2cd13c30f6f157

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising 'free Robux' and 'game hacks' to lure users. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-survey-2021-game-hack. The document body and embedded URLs suggest a phishing or scam attempt, likely aiming to redirect users to potentially malicious websites or surveys.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

Heuristics 4

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.
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/free-robux-survey-2021-game-hack In PDF document text
- https://lib-stie.yai.ac.id/repository/all-free-clothes-in-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-cash-codes-for-roblox-miner-haven.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-do-you-get-free-robux-in-real-life.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/black-clover-online-hack-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-hack-mad-city-roblox-step-by-step.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-skateboarding-game-on-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-jailbreak-freeing-prisoner-from-handcuffs.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-critical-strike-deluxe-hacks.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-hack-a-game-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-hack-into-someones-roblox-account-2021.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
`stream_003_off00003f48.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3F48	29980 bytes
SHA-256: `d875d33bfb7ce07192a56ed369f8aba87cb37d0f8e0298da4dc5397106654399`
`font_01_sfnt_off000083bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83BB	18712 bytes
SHA-256: `97a74c0f29c1cf43142bb51e850b25641c409dd40a9e69837bf7bc5ac069eba6`

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