Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a976ad3d5e24a6…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 05:10:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 80e3ce2f7b0bc09ffe06bfb4e10e6f8d SHA-1: f146c8de3b748637662ae741932c71d4fd7af739 SHA-256: 13a976ad3d5e24a63044a137212113bcf2e1abd8b28737d76f29c11384aa49bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure for 'Coin Master Daily Gift Free Spins and Coins' and embeds a URL pointing to a similar offer. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect the user to a malicious site for phishing or malware distribution. No scripts were extracted, but the overall structure and embedded URLs are indicative of a common social engineering lure.

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.online/app/406889139/coin-master-daily-gift-free-spins-and-coins-link-today-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/robux-money_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/freerobuxhack-us_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
stream_004_off00004ff7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF7 26780 bytes
SHA-256: ea956aef78f3d9c6f95b1810a731fef7cabe49fc3cbacf560bd1dd7cf540795b
font_01_sfnt_off00008ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB3 18652 bytes
SHA-256: acc88e8ff3d4d09cb66d664b97f6065b804d1ea0ab1b79688b3054775362f50f

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