Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2556e1a37ba641…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 11:09:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 36f25ffd22a2d7dee76add1d9074e674 SHA-1: e984893ebee01bd1aeb83bc1f5e437baf4070df3 SHA-256: 2c2556e1a37ba6417cf8402d6e6a6a0575e853632204f4ec73d0b0ba2ac66226
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The ML classifier also flagged this PDF with high confidence. The embedded links likely lead to further malicious content or phishing pages, indicating a social engineering attack.

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/479516143/best-minecraft-hacks-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/tiktok-unlimited-free-trials_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-much-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-free-robux-2021-february-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-robux_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_004_off00005016.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5016 25664 bytes
SHA-256: 7abc8660410ece9ba64b844f492cdbc6598ea8caa98f23da7d714efbb3e342d1
font_01_sfnt_off00008aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAF 17952 bytes
SHA-256: 6dfee1982b58ab3489cc821793519200b658269375d8b02cd788103d93863fb8

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