Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4d0b12592104ce…

MALICIOUS

PDF

43.4 KB Created: 2021-05-18 00:43:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82941263cdf0020bfa912fe744a1a94b SHA-1: 50e0a5a6873d865762769fe88b1bf70f4f12fcfe SHA-256: 4c4d0b12592104ce4b61d558617ffd32e0172972e77f99b478c438838661380e
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are related to game hacks and cheats, suggesting a lure for users to download potentially malicious software. The ML classifier strongly indicated maliciousness, and the presence of a download button heuristic further supports this. No scripts were extracted, but the document's structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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
  • 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/roblox-download-game-hack
    • https://heimatverein-oberlangen.de/images/cm-spins_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/free-robux-no-verify_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/how-to-get-free-robux-generator_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/how-do-you-hack-minecraft_GM479516143.pdf
    • https://heimatverein-oberlangen.de/images/como-generar-coin-master-free-spins_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-33-hack-version-download_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/free-robux-without-human-verification-real_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-70-spin-link-today_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/free-spins-coin-master-links_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-deals_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-free-spins-daily-2021_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/hacks-to-get-free-robux_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-daily-free-spins-link-download_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/free-robux-redeem-codes-2021_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/free-robux-with-no-verification_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/coin-master-hacks_GM406889139.pdf
    • https://heimatverein-oberlangen.de/images/real-robux-generator-2021_GM431946152.pdf
    • https://heimatverein-oberlangen.de/images/minecraft-hacked-apk_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000498b.bin
28640161debf8a945fba2a511016970a1e79a9db2452d7d407a8032f1102e32e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498B 26568 bytes
font_01_sfnt_off00008664.bin
21b28ace4d932993d49d3193db8b098f0f06cc97e3b5056ef7549ebd787d2b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x8664 18520 bytes