Malicious PDF — malware analysis report

Static analysis result for SHA-256 124ea30d16c99b5b…

MALICIOUS

PDF

32.8 KB Created: 2021-07-21 00:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7afa834a396be3979759899ebb632d2e SHA-1: 29a0986071de460cd2b9eca433a1f30945ec2961 SHA-256: 124ea30d16c99b5b226d4bff9b6ca29c9cecacc673e7dd89cacef420ba892e45
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 0.9900

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 http://netcdn.tw/app/406889139/free-coin-master-coins-and-spins-game-hack PDF link annotation
    • http://www.bripi.pl/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/how-do-u-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.

FilenameKindSourceSize
stream_002_off00002b0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B0D 23072 bytes
SHA-256: 42397012195000c0f75b877e0af65421fd5e49d2abf00a19e77ef84d5ab769fc
font_01_sfnt_off00005ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC8 18060 bytes
SHA-256: 11bd500b33c169b65e53ecddb4cd7ac7428d9a9bdc32d60ba78f45c9260aee9d

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