Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36dc164ec691cc0…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 07:07:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8df165702b00696320ab79329ce8d13 SHA-1: 213fbfbefb7705e7d57ab3e1cd149e135173fac4 SHA-256: b36dc164ec691cc00acabdde9d310407d018c2e86051efcaf1fc30f04901cec8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual download button lure, strongly suggesting an attempt to trick the user into downloading a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the presence of external URIs and the overall structure indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

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/406889139/coin-master-free-spins-generator-no-verification-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-zoo_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/ispoofer-pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/tiktok-free-folowers-free_GM835599320.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_off00005243.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5243 24564 bytes
SHA-256: f4b8b32d902fac5a3b180282fc4c8258e966ec78f6aad661480f8742c70993ea
font_01_sfnt_off00008ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADE 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000094c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C9 18020 bytes
SHA-256: cc763048b76c9189c14999db918bcac9f3f262aeea1a03aaf6cd39ac3f323e93

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