Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ca11042aec3876…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 17:42:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6f5c4d59fb0fc6009256f6e635a76023 SHA-1: e4076bea4089eac9231c8ccb2999482cb601474e SHA-256: a4ca11042aec387698a42cd39c2cc624081130e5795bd0df9b08824794d46bcf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that advertise game hacks and generators, a common lure for malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URIs and the nature of the lures suggest an attempt to trick users into downloading malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/479516143/wurst-download-game-hack PDF link annotation
    • http://iedarelief.us/images/wurst_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/roblox-re_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_003_off00004679.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4679 25500 bytes
SHA-256: f0554d4b374bb5e6fa8b4baf8795f07431d4245de7ce275df12adbf838935d5c
font_01_sfnt_off000080c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C2 18508 bytes
SHA-256: fa1f483b34cb572f7f62a7150fe0d508507468ba2dbe973ec2c8b024440d6681

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