Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a9a3439ca6f0e4…

MALICIOUS

PDF

45.5 KB Created: 2021-06-07 08:51:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8773df05a9242e913ac50cce6d2a6bd3 SHA-1: 067c941c1563326401f57ace4f3128d376742678 SHA-256: 68a9a3439ca6f0e47fa81c42b9cce3d505c21532ec9a561f972af48664808460
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 0.9864

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.tw/app/431946152/how-to-get-free-robux-on-a-game-game-hack PDF link annotation
    • http://www.aqas.it/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.aqas.it/images/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/pubg-uc-free-app_GM1330123889.pdfIn PDF document text
    • http://www.aqas.it/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.aqas.it/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.aqas.it/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://www.aqas.it/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/coin-master-hack-trick-2021_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_004_off0000523a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523A 26200 bytes
SHA-256: 046460f2d4f1ae82dc5629ad5985a850b11cf02f59b14ca7ee0d1763eb6039bb
font_01_sfnt_off00008ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 18768 bytes
SHA-256: cf658a4808481a531a1fb4ec3f2b1f556d8e3c9a96849bf529aa84cd4101fab3