Malicious PDF — malware analysis report

Static analysis result for SHA-256 c924d0cc7626a716…

MALICIOUS

PDF

44.8 KB Created: 2021-05-10 23:03:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4ef44eb01174a8dd59d878dd6b9317dc SHA-1: fd33b633a7de5c9ae921fb8020a5600af123d638 SHA-256: c924d0cc7626a7167fa2058e140146fb7b7b818eebef2bbddfb740c781b408a1
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 0.9632

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/406889139/coin-master-15-free-spin-link-today-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004990.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4990 24428 bytes
SHA-256: a5034993d55eeba72a8e47d91db0da98c89834d80ed8721339d064ea5ba24edc
font_01_sfnt_off00008191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7B 18652 bytes
SHA-256: 5b53a5b683b77cc6f0f815c556bf9926b59998be6e817bd3b756384118128b65

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