PDF malware analysis — malicious · 1d767a0bfe406f50

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 17:09:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 3061ab9b215937e0682ebe29020651f5 SHA-1: 4b548419466f22425d8fbd64b479063ac28bdd68 SHA-256: 1d767a0bfe406f50f2673b887561e0f0a17f5fa23889fdaf25212e4a4bd66dad

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a malicious redirector link disguised as a game hack generator, which is further presented via a fake CAPTCHA to trick the user into clicking. The document body and embedded URLs suggest a lure for free in-game currency or cheats, likely leading to a malicious download or further exploitation. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or social engineering attack.

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/how-to-hack-coin-master-game-game-hack In PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/robux-place-rewards_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
- https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_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
`stream_003_off00004c1b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C1B	24760 bytes
SHA-256: `3fad5582bcd4993034e32036ba246910b80bbe5585f01c3ddf084c87244ca724`
`font_01_sfnt_off0000845f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x845F	18140 bytes
SHA-256: `5d184f7874437acb266cbaf4c3c8277ec99de1ce710386c314af5b284946c89b`

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