Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa69788cf50c9cd…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 17:19:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aafaaa2500013d920b59ea50159d84a4 SHA-1: 01f1df0beeaae344142201e29c7bbe3afbe4594c SHA-256: 8fa69788cf50c9cd98cb176af80b33cb8ed4b51288f8a8a45f126ceba1effe19
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 'free generators'. The primary malicious URL identified is https://netcdn.tw/app/431946152/logiciel-hack-jailbreak-roblox-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 harmful content, likely as a lure for further malware delivery or phishing.

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.tw/app/431946152/logiciel-hack-jailbreak-roblox-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-hack-free-robux_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
font_00_sfnt_off00005184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5184 25000 bytes
SHA-256: 988522e0ded552cf347414b27a93fdcb33e2c1dfda4f252c9a94c8a72911b5f2
font_01_sfnt_off00008a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A69 18756 bytes
SHA-256: 969f9cb40932849ccf10596f0867ecc9d29e0a10b12014dc22b26719c698bed6

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