Malicious PDF — malware analysis report

Static analysis result for SHA-256 d923c3ad96fc569e…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 08:33:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66e4aa28135a081374dfc3be5373fbc0 SHA-1: c65a422de1abd68e485218472c73614193b7f4d5 SHA-256: d923c3ad96fc569ea071885543012d2672ce1c42179682bb2455efe9c0389132
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body, though partially corrupted, contains a URL that aligns with this finding. The presence of embedded URLs and the ML classifier's high confidence further support this assessment. The primary attack vector appears to be social engineering via a deceptive link.

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/how-do-you-get-free-pet-food-in-coin-master-game-hack In PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C77 24592 bytes
SHA-256: 9edf7837f8597e860d19c378e783313b5186d4d50afe7ad57e2f6b67adee9266
font_01_sfnt_off000083fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FD 18672 bytes
SHA-256: cff39daf026dc40ed6ecaa9210f7f2c1a86de44fdb8191942dcd9a9d80f52395

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