Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8e2fb4c6676bc2…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 06:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8366b7102e9298ea422c7a8ce3d2a4ac SHA-1: 8b4fa639ecabe652173340a2ebcedc739adaae7f SHA-256: 6f8e2fb4c6676bc29ac0aae094180b83721c9e0a089f6aee0c95e1af09d64772
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The primary URL, https://netcdn.online/app/406889139/get-free-spins-on-coin-master-2021-game-hack, is likely the destination for the lured download. While no scripts were explicitly extracted, the ML classifier flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/get-free-spins-on-coin-master-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pokemon-go-free-qwilfish_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-codes_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_off00004f37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F37 25140 bytes
SHA-256: 7a79fadb1eb675cfa2523e24a9bf9c91ede080f9f0a7550631f79cb87cf047bc
font_01_sfnt_off0000880b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880B 18288 bytes
SHA-256: 51edae499e96af11139ef94313efcbf906f73cd888d739ca20624da83f1b55af

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