PDF malware analysis — malicious · 78d81568c842461a

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 23:03:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 2c8464262a914910788f78fb54374167 SHA-1: d3843e801414cd2af8a20fea93e9be838b5af78a SHA-256: 78d81568c842461a11453efa38ab29373edaad5434d11d15d765e8ee24a7aaee

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are identified as malicious redirectors, specifically promoting 'game hacks' and 'generators'. The heuristic firings strongly indicate that this document is designed to lure users into clicking these links, likely leading to further malicious content or downloads. While no scripts were explicitly extracted, the nature of the links and the ML classifier output suggest a high likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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-spin-hack-game-hack In PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
- https://www.clinicalsim.com/uploaded_files/userfiles/files/www-roblox-com-free-robux_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_003_off000049fd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49FD	24452 bytes
SHA-256: `e0bdab90d10536a64f2a3beae46321845fc94bddc213609eb9f07b8422f690bc`
`font_01_sfnt_off00008222.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8222	17892 bytes
SHA-256: `7f3ff29013eb9f1a81458cbc85dd3db40ecf793c6bb68bdfdc199744a029032c`

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