Malicious PDF — malware analysis report

Static analysis result for SHA-256 438280befc52ff92…

MALICIOUS

PDF

42.7 KB Created: 2021-05-20 02:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ceab32c6741a6b3a4c0c677bb3cac360 SHA-1: d82a53c72879cc86f40b0fe5a97976798e0d5bdc SHA-256: 438280befc52ff92969e9c19c432ab35ffc7dacb682c8b85cb177a2da0146e57
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a browser extension installation lure to trick users into compromising their systems. The embedded URL and numerous other URLs point to sites offering free in-game currency or followers, a common social engineering tactic. While no scripts were directly extracted, the ML classifier and the nature of the lure suggest a high likelihood of malicious intent, potentially involving JavaScript execution or exploitation of PDF vulnerabilities to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/tiktok-free-followers-without-verification-game-hack
    • https://ogm-goettingen.de/images/how-to-get-free-robux-website_GM431946152.pdf
    • https://ogm-goettingen.de/images/free-links-for-coin-master_GM406889139.pdf
    • https://ogm-goettingen.de/images/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • https://ogm-goettingen.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://ogm-goettingen.de/images/huskybuckscom-free-robux_GM431946152.pdf
    • https://ogm-goettingen.de/images/rbxoffers-com-free-robux_GM431946152.pdf
    • https://ogm-goettingen.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://ogm-goettingen.de/images/minecraft-pe-free-download-android_GM479516143.pdf
    • https://ogm-goettingen.de/images/free-coin-master-stuff_GM406889139.pdf
    • https://ogm-goettingen.de/images/free-robux-2021_GM431946152.pdf
    • https://ogm-goettingen.de/images/coin-master-deals_GM406889139.pdf
    • https://ogm-goettingen.de/images/easy-free-spins-coin-master_GM406889139.pdf
    • https://ogm-goettingen.de/images/robux-fun-hack_GM431946152.pdf
    • https://ogm-goettingen.de/images/free-vpn-for-minecraft_GM479516143.pdf
    • https://ogm-goettingen.de/images/free-robux-please_GM431946152.pdf
    • https://ogm-goettingen.de/images/spin-and-coin_GM406889139.pdf
    • https://ogm-goettingen.de/images/minecraft-switch-free_GM479516143.pdf
    • https://ogm-goettingen.de/images/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • https://ogm-goettingen.de/images/best-free-minecraft-skins_GM479516143.pdf
    • https://ogm-goettingen.de/images/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000043da.bin
6f0e09421eab0ae63044f12746636490f33c975d133ee083d474d25b92f9e3fa
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43DA 23628 bytes
font_01_sfnt_off0000794c.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x794C 2880 bytes
font_02_sfnt_off00008336.bin
dbd1644aa70a7168f1fc84b422798759315819d95892226bb719e2e7d638c6fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 18560 bytes