Malicious PDF — malware analysis report

Static analysis result for SHA-256 5327d842462ceb39…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 13:04:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 98acf0d06daa2e3b3f0a6d3aab82f1c9 SHA-1: 21145cc22a43688a6cd0f6ef64e03116e77ec941 SHA-256: 5327d842462ceb396cf5d55e9ea49c928207ece472eae4eec5729c00c4544fbe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at 'https://netcdn.online/app/431946152/free-robux-youtube-game-hack'. The document body and embedded URLs suggest a lure for game-related cheats or items, aiming to trick users into visiting these malicious sites. The presence of a visual download button further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/free-robux-youtube-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-no-verify_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_004_off0000537b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537B 26120 bytes
SHA-256: 95d30051f03cb17430ce9fd019fe40a1be9eaa41fee0577cb3a5c5cbd2c196f3
font_01_sfnt_off000090ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EF 18280 bytes
SHA-256: de5b074060e7ee0fa0230ac6212805924cd4a5679e09505111534b28358c176b

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