Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9f236126ee21d0…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 01:09:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c76745c02dd9890273c3a2fb1deea5e8 SHA-1: f45d2027515fbb306f02eb9a32137de3ea3b2ee0 SHA-256: aa9f236126ee21d078163c86d9ff2313a7bf6089de5e410e96a9dc5a22948ae7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and generators. The primary redirector URL is https://netcdn.online/app/406889139/coin-master-free-spin-whatsapp-group-link-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for further malware delivery or credential harvesting.

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/coin-master-free-spin-whatsapp-group-link-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiktok-free-netflix_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-earn-free-spin-in-coin-master_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_off0000507c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507C 24440 bytes
SHA-256: 2fd92a93598cdf3ab794b76005e4a3203aeec13fcf03e0718872edd1fd55c2d4
font_01_sfnt_off00008886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 18560 bytes
SHA-256: c65993a8877690b51d5778b5551e0b245465244fc3a88f38fe2d5d44dfc47c4d

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