PDF malware analysis — malicious · 9d8c5d964eda53d7

MALICIOUS

PDF

44.9 KB Created: 2021-06-01 00:15:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d36c423f934f298d1356b18607015efe SHA-1: 042d43123ef08233edae56e642ce1d92e166003b SHA-256: 9d8c5d964eda53d7eeeec66b9e6877f8b6bd59ccbdad09204c4540459a6da717

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains numerous URLs pointing to sites offering free Robux and game hacks, indicating a lure for users to download potentially malicious content. The presence of 'cmd_GM431946152.pdf' and related filenames suggests an attempt to disguise malicious executables as PDF files. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 5

LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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
External URI info PDF_URI

PDF contains an external URL action
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/free-robux-youtube-live-game-hack
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/tiktok-follower-bot-free_GM835599320.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-scams_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/tiktok-free-views_GM835599320.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/hack-robux_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/howt-to-hack-roblox-with-cmd_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/hack-tiktok-fans-free_GM835599320.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/roblox-jailbreak-hack_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-videos_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/100-free-spins-coin-master_GM406889139.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/apps-to-get-free-robux_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/mode-de-hack-sur-roblox-bee-sarwn-simulator_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-hack-work-at-a-pizza-place-roblox-2021_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-tiktok-likes-and-followers_GM835599320.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-no-verification_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/google-music-roblox-hack_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-promo-codes_GM431946152.pdf
- https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-tiktok-coins_GM835599320.pdf
- https://zbych-pol.pl/wp-content/uploads/
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005119.bin` `97ad55886adff8fde99766ae3edbbc61871256baa25e49cc73a76eb1ba42df3f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5119	25756 bytes
`font_01_sfnt_off00008c31.bin` `d453283dbd15e199d4c4ec24bf70d90cc07729c0e75d24929cf09bf681f3a23c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C31	18512 bytes

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