PDF malware analysis — malicious · 754622e0b2956c35

MALICIOUS

PDF

48.3 KB Created: 2021-05-13 07:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: ca75232c93cd6c981ebc8f85ad6ce2f3 SHA-1: 2cd909de4480477a8c432a9fd45a196fb5780c35 SHA-256: 754622e0b2956c354cf6c76d8dce99e85f66c71b75fd8d5e20897701a45b74c6

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, masquerading as generators for game hacks and free in-game currency. The heuristic firings indicate a lure for game hacks and a link farm, suggesting the primary goal is to drive traffic to these malicious sites. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.8715

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/406889139/coin-master-free-spin-app-iphone-game-hack In PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/robux-hack-2021_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-gift-link_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-rewards_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-links-to-get-free-spins_GM406889139.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_off00004a4e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A4E	25344 bytes
SHA-256: `356aa0fa515dd7316089ecd59413fb717f7783834442574138c47ede52a07da8`
`font_01_sfnt_off00008358.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8358	4028 bytes
SHA-256: `a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91`
`font_02_sfnt_off000090f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90F8	2788 bytes
SHA-256: `6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530`
`font_03_sfnt_off00009ae7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AE7	18052 bytes
SHA-256: `4aba056016aeb65aeba62e03d7234ea924a4b970c64610ba6e784186ab2969a1`

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