PDF malware analysis — malicious · 8aa37cb996bf6abc

MALICIOUS

PDF

41.2 KB Created: 2021-05-18 02:03:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 9ae37e0ff34b797128384c490a34c50e SHA-1: 2bdaac1c4cf6f019722996cac29c19e53b910517 SHA-256: 8aa37cb996bf6abc2a8ca34b31cb152ed66a60cc6f56ea0b5e6b0febf32678f6

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically promoting 'game hacks' and 'generators' which are common lures for malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to redirect users to potentially harmful websites, likely for malware download or phishing.

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/431946152/get-robux-game-hack In PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/fbchampion_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/robuxmatchcon_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/coin-master-game_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/free-premium-roblox_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/client-minecraft_GM479516143.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- http://www.sharp-calculators.com/files/ckfinder/files/can-you-actually-get-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
`font_00_sfnt_off000048c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48C4	23864 bytes
SHA-256: `ad3548281043665f96c3bd4352048cad83ad49f68da74f7da498fbba6be7a77f`
`font_01_sfnt_off00007f59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F59	17952 bytes
SHA-256: `a34a0f77aa554f5c92185b6c86909c5f9e39b3171f9efb4f2c073b614301e128`

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