Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5c57e6b1593a2b…

MALICIOUS

PDF

36.4 KB Created: 2021-07-05 21:45:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 736d78fb8105b58a326de06b29d838c1 SHA-1: 2e985f8f271c9ce1f4be066faaa65639348f375f SHA-256: 9b5c57e6b1593a2b66a47c298a5e23f06ffdd1e163113cc6b1c366515ce3f6da
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to 'netcdn.tw' which is flagged as a game hack redirector. The document body, though partially corrupted, also contains this URL, suggesting a lure for users seeking in-game advantages. The presence of numerous similar URLs hosted on 'library.apsidoarjo.ac.id' further reinforces the phishing or scam nature of this document. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-reward-link-2021-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-on-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/prison-life-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/best-free-weapon-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/buxgg-robux-generator-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/demented-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-space-outpost-tycoon-script-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-robux-hack-online-no-survey_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/give-me-free-robux-right-now_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hacking-on-mano-county-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-coins-hack_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
font_00_sfnt_off000036a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A4 22956 bytes
SHA-256: fdd8c4abdbf940db843ce04c5c2a474241fef072f5573100573c736d1e195347
font_01_sfnt_off00006a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A12 18744 bytes
SHA-256: 9742e917eaee576a08eb7c2de5a8b19b3ef10f2b928cd9d8b8b61d70ae14d143

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