Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1d403f55f3714a…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 06:58:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2cbfc61bd4b40d075f1ef29938a8cb2a SHA-1: acc18b9e9cfd9a1a33c6cbb32b6d273bc9681e72 SHA-256: 3a1d403f55f3714a34b4fee0e2f3474ef1fa4827dc5b6c4dab81cb8724e6492f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document employs a common lure of 'game hacks' and 'free currency' to entice users. It contains a large number of external links, many pointing to other PDF files, indicating a link farm strategy. The primary URL directs users to a page promising game hacks, likely a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/406889139/how-to-hack-coins-in-mcpe-master-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-get-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-com_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-facebook_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_off0000516f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516F 24184 bytes
SHA-256: 3f78d1ca86f8a9cc2a59f131b109129706e9cb237d9461b8d1e10404314c5d34
font_01_sfnt_off000087cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CF 18056 bytes
SHA-256: ea749421c9763e897f0775a2fca8a7e481d8ca205e309ab3fda826117ef8ab8f

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