Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9eb548c4dc288f…

MALICIOUS

PDF

49.2 KB Created: 2021-06-11 02:03:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cdbf32f6cc30ce4111e7c4619066d336 SHA-1: dc67f4b5c91994dc5b4b1f97dbf43f20182dfbf4 SHA-256: 1a9eb548c4dc288f8425b9cb0e588ceeda76c2a8ec73b86c79dbffa11ac741ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators' for popular games. The primary lure appears to be a Roblox Weight Lifting Simulator 2 hack, directing users to a URL hosted on netcdn.tw. The document also contains numerous other links to similar lures hosted on lib.untad.ac.id, suggesting a campaign distributing various scam-related content. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-weight-lifting-simulator-2-hack-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/pokemon-go-free-incense-2021_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-weight-lifting-simulator-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-free-roblox-exploits-v3rmillion_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-card-collection-hack-apk_GM406889139.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_off00004f9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9F 26492 bytes
SHA-256: 7ef01c7bead50f047adc50a8b34c5534f64216a753a73ecc892ee7b06eabb98c
font_01_sfnt_off00008cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAD 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000099bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99BF 19584 bytes
SHA-256: 6e054a92d420f38179bb7e81ea1dc51f8f0723286dfaad9ae4b4e2f708340e83

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