PDF malware analysis — malicious · 3bae038f00a8d7a2

MALICIOUS

PDF

44.9 KB Created: 2021-06-07 04:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25

MD5: a3894e78fe95ae1f81b81ee35f8ad4b6 SHA-1: 95a42b9c049c0733e343150ca257ae5a25e9c132 SHA-256: 3bae038f00a8d7a226de7bf51a5a5fbe2779e1459578d9236ca0a99bb5118f35

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items, a common social engineering tactic. The document also prompts the user to install browser extensions or updates, which is a known method for malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to exploit user interest in free items, potentially leading to credential theft or malware execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 6

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.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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.tw/app/431946152/how-to-enter-paid-games-for-free-roblox-game-hack In PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/free-robux-codes-giveaway_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/wanna-join-my-free-giftcard-giveaway-roblox-id-audio_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-athoi-admin-hack_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-fnaf-rp-how-to-get-free-via-ilovecat123_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/mega-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/how-to-get-free-robux-and-it-actually-works_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/hack-robux_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/hack-para-dragon-ball-super-heroes-roblox_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-skins-girl-free-download_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/how-to-hack-roblox-account-2021-zero_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/free-roblox-download-for-android_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/rocitizens-roblox-hack_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-zombie-rush-level-hack_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-one-piece-golden-age-cheat-engine_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://isaf.co.za/wp-content/uploads/fsqm-files/roblox-piano-gui-hack_GM431946152.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_004_off0000523d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x523D	24492 bytes
SHA-256: `6373260a06008d42c55f3acaff9bea4104036486b466bdafd78e3038debc35b3`
`font_01_sfnt_off00008a66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A66	19152 bytes
SHA-256: `5c31114eb572c37589cef9d095a954044f4be74f20e278298b2da9d492f4a31f`

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