PDF malware analysis — malicious · b19a3d7fb4cca7d1

MALICIOUS

PDF

49.9 KB Created: 2021-05-16 14:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 9c8d03433a1e9a9cbb957197dc4a6f27 SHA-1: 09646991c4f032bdac1f58bd9015f053864db5e9 SHA-256: b19a3d7fb4cca7d1a4cb5014545e642fda606f7672d2cf0a4b6dcaee7e965d1b

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users to click on embedded links. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirector designed to lead users to potentially harmful content or further phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.8594

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/406889139/coin-master-hack-mobile-game-hack In PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coins-master_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://www.cityonlinestores.com/uploaded_files/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004be5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BE5	26172 bytes
SHA-256: `c9f92e93d7fa0630937d088b53fed6992a63875345dbd086902f0f98cb4363f8`
`font_01_sfnt_off000086f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86F9	4812 bytes
SHA-256: `8509f1138d188676ddf8671c0a98182a7650bb1daec55d2c59cf9303ffa1ab8a`
`font_02_sfnt_off0000977d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x977D	2788 bytes
SHA-256: `6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530`
`font_03_sfnt_off0000a16d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA16D	17948 bytes
SHA-256: `d85bac05a6c530c5997aad474557790cc9f5c9ab79cb3a200cdd52cd9bbf1317`

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