Malicious PDF — malware analysis report

Static analysis result for SHA-256 61cc10ea6a8f40ad…

MALICIOUS

PDF

37.6 KB Created: 2021-05-24 07:42:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 16924e85a97091a512ea0df1c443e59f SHA-1: 26a64dc8d7b780dadeb49650ff44c12ab48acb4a SHA-256: 61cc10ea6a8f40adc3f4e28c2880d56a77d4750705ba0444b3a98df047df3b04
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 0.9447

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-human-verification-game-hack PDF link annotation
    • http://jkcoaching.nl/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://jkcoaching.nl/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/moon-active_GM406889139.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_off0000345a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345A 26488 bytes
SHA-256: 3df7dbcd4e4f3f6532a57d723131593184d8c81645956ad70da80acf4fb3a741
font_01_sfnt_off00007002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc

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