Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78d012fbdce0acc…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 06:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df0f3e56477bf1f5991d14d30349bb41 SHA-1: f0344a9a210a77cc9e69ee71b6fb40e6dc9c3e07 SHA-256: a78d012fbdce0acc5942a3b611bee3c426e7469ed397b29faf64ceacf380b396
200 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector URL, masquerading as a game hack generator and impersonating Facebook. This strongly suggests a credential phishing or malware distribution attempt. Although no scripts were extracted, the embedded URLs and the nature of the lure indicate malicious intent, likely leading to a second-stage download or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/free-coins-coin-master-haktuts-game-hack.
  • 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/free-coins-coin-master-haktuts-game-hack In PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man3majalengka.sch.id/__statics/gudangsoal/files/get-more-robux_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_003_off00004f20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F20 24808 bytes
SHA-256: c80bce4dd54db585842f2cd5334350d9fee6164d64c01dfdf37322f455527696
font_01_sfnt_off00008708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8708 18020 bytes
SHA-256: 885405c0f3c82632f67cbbf76e9de88f1d1af146284216a58ab90767d16be517