PDF malware analysis — malicious · 6b81b7bf04e4665e

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 12:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 99fb24bc858dbc4f79f667ecfc6bebbb SHA-1: 629fd658212c6f2a7a7596ebc6ccf96e78b92004 SHA-256: 6b81b7bf04e4665e126e7e4d9fa1ed3e824b1e2d156621d2dd06d7736ddf3363

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external resources, many of which are SEO-optimized PDFs hosted on a subdomain of stain-madina.ac.id, and a primary link to a known malicious redirector. The document body explicitly mentions '500 Free Coin Master Spins' and includes the malicious redirector URL, indicating a lure for users seeking game cheats or hacks. The presence of a malicious redirector and a large number of linked PDFs suggests an attempt to drive traffic to potentially malicious sites or downloaders.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/500-free-coin-master-spins-game-hack In PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/fishing-simulator-roblox-hack-vehicle-mods_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-a-free-batteax-knife-without-robux_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-geometry-dash-roblox-odes_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-freebies-com-hack_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-generator-without-human-verification-site_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-gift-cards-not-used_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/follow-people-in-roblox-hack_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-free-robux-in-roblox_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-robux-on-a-phone-2021_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-robux-on-ipad-mini-4_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_002_off0000300c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x300C	22380 bytes
SHA-256: `5907747536ca9a00599e3870ae6e96d09c2f86fc69b4c67d7eefc2ae968c01b4`
`font_01_sfnt_off000061fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61FB	18480 bytes
SHA-256: `73c3da9d0f6a331a6fde753084a8aebf2b702254561fcc1354a5e6554f17134d`

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