Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4151fa010bd5991…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 21:37:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 214f9e46bb91439d8c6c4ee8a36164d0 SHA-1: b19b2b874ef340e2bc162cf93cad121fcc8fc3bf SHA-256: a4151fa010bd59910148add07b676b3541e4e2e176962e06e5a1b370122a18a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and game hack lures, indicating a phishing or scam attempt. The document body and embedded URLs suggest the primary goal is to trick users into visiting malicious sites, likely to download further malware or engage in fraudulent activities. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/moonactive-free-spins-link-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/app-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-link-today-facebook_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_003_off0000464e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x464E 24720 bytes
SHA-256: f7aa9f81e821247adaf01cc57bc51509c1e2e7b0418c542cefc23b44e6c63d4c
font_01_sfnt_off00007e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9A 18168 bytes
SHA-256: de83cce042fd98afd312ce6d9ac17b5793122de6df0909979501f1e1abb9aa75

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