Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53c6653a97c6062…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 07:56:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9a8045385179c700672a83b203ef21bd SHA-1: 8ffb1014242c639119b09b082e538b38d6697279 SHA-256: d53c6653a97c6062e80ef5346536b949e3cc7487efeb05d29dda5b9718f4c19b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spins-coin-master-2021-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/free-spins-coin-master-2021-hack-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/pokemon-go-hack-free-pokecoins_GM1094591345.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-tiktok-followers-quick-and-easy_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-without-any-verification_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_004_off000050b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B7 24484 bytes
SHA-256: 41ad27ff9f6638a9a3970ea419df4daae8d67cb1ed6e525d1a878df9a977299a
font_01_sfnt_off000087cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CD 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000091b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B8 19784 bytes
SHA-256: 96f7f4758fc502363a975c18af6f501cce5dea8f0164d8f13da126ce2947735c

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