PDF malware analysis — malicious · e45f0b9073d70262

MALICIOUS

PDF

47.3 KB Created: 2021-05-15 05:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 25b1b59e0c3826841c3de8aca5468ce0 SHA-1: afd19ca76c98769b48d1e4586cf82c9f50bb8611 SHA-256: e45f0b9073d7026204d4676410f545070436727d538664eaa6102c5f902430a4

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as 'game hacks' and 'free generators'. The document body and embedded links suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The presence of numerous SEO-optimized PDF links further indicates an attempt to distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/how-to-get-free-robux-without-doing-anything-game-hack In PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/abd-roblox_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-coins-on-coin-master-2021_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_off00005010.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5010	24520 bytes
SHA-256: `fef1ed84712203fbfa448f825ea17f25fb060e4e587b2cce7034fcc3a35b0e5c`
`font_01_sfnt_off00008813.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8813	3128 bytes
SHA-256: `6e88a6e4d7e325d7b43b86ed35ea4453ec00af7c9ac2ad8c7933791a703425e0`
`font_02_sfnt_off000092e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92E2	19400 bytes
SHA-256: `843e7c6de0628ecb74dfde19cdfb212261a67f0d6d996bc16e2547f6c0bce3d3`

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