Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04554784f503c53…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 07:44:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d3daac12d5177e756dfa2a55c0efe456 SHA-1: 8a21a6bb0b283710530eee08d456ff403f40e5ad SHA-256: c04554784f503c5303081107b3b8d6d1e0c2eaa6401e2bc4386d665bb31bee24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body explicitly mentions 'Coin Master Hack Apk Download' and provides a URL that leads to a known malicious redirector infrastructure. This suggests the document is designed to trick users into visiting malicious sites, likely for further malware delivery or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-hack-apk-download-latest-version-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-free-view-iphone-7-plus_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-robux-generator-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-avatar-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-project-pokemon-cheat-engine_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-flying-hacks-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hacks-were-you-can-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pokemon-go-free-online-play_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-card-codes-deutsch_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/fastbucks-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-for-kids-no-verification_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_002_off00003170.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3170 23380 bytes
SHA-256: 9b174a62dcfdb27b38837b13c85d8244f1b1e1623dd81875fd7f16378fe654c1
font_01_sfnt_off000065f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 18892 bytes
SHA-256: 7fa9fea77b90b5a53e3021a8fe9e8f56f5c070ffe2570303cf0df850e75cf2ba

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