Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1543231e35a4e44…

MALICIOUS

PDF

43.8 KB Created: 2021-05-23 15:34:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 900cde8e34abddbe06d88aa059776a34 SHA-1: 114afa56a4ca740bc8aec15fd817eec93732c1d5 SHA-256: e1543231e35a4e4443d0ff6d4c11f24625d8cdce459826023f4ae082a8e48a9b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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-no-verification-2021-game-hack PDF link annotation
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F8 26056 bytes
SHA-256: ae50d7299ccae5d6ec80e6c5666e1d131b7aa0acc36bad07bc7bf41f38005bd5
font_01_sfnt_off000070ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AD 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off00007a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00008767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8767 19004 bytes
SHA-256: d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2

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