PDF malware analysis — malicious · b2f3671dff3ae48a

MALICIOUS

PDF

45.3 KB Created: 2021-05-16 06:53:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: d885f9150ae55611de6a08e12554ae1e SHA-1: 5c5be1b084b081dfc4ae0c585438a92b5a35a0d7 SHA-256: b2f3671dff3ae48ab1c38bacf60dbe2fb93d4ebfbe7d1fce56a1fee93e3db61d

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, such as the one pointing to 'roblox-g-game-hack'. The document's structure and embedded links suggest it is designed to redirect users to potentially harmful websites, likely for downloading further malware. The presence of multiple related PDF files hosted on the same domain reinforces the phishing and redirection intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9551

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/431946152/roblox-g-game-hack In PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/earn-rbx_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/coin-master-cards_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/link-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/roblox-robux-page_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_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_off00004b3e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B3E	25232 bytes
SHA-256: `84ef7de7875e56f9908aac24808ab21ef5a0c967a5739f8276e8397ca559f02e`
`font_01_sfnt_off000085f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85F5	2880 bytes
SHA-256: `552e62132cae3603ce0819827e44d96a992bd06014cc5080bf3af4b2ea155b3e`
`font_02_sfnt_off00008fce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FCE	17784 bytes
SHA-256: `4bd2d0041dee7b7796a1d14ead449b1e4ac2afb962c20115eab39ba9eb76df9f`

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