Malicious PDF — malware analysis report

Static analysis result for SHA-256 425b5aa865f1b490…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 04:26:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d96d29cc48c9dc37e8860d37b85d5d0b SHA-1: 69df0e7cf4cf3facf7077578d43fd544da57f93a SHA-256: 425b5aa865f1b4908af103eaf45973d62b4fcb77a5e7857d1d32b47aaaeffb8d
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites that advertise game hacks and in-game currency generators, such as 'coin-master-32-android-mod-hack-apk-download-game-hack'. These links are flagged as malicious redirectors, indicating a high likelihood of leading to malware downloads or phishing sites. The document's content and embedded URLs strongly suggest a social engineering tactic to trick users into downloading unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-32-android-mod-hack-apk-download-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-999999-robux-2021-pc_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-gifts-right-now-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-or-codashop_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-faces-roblox-catolog_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-instantly-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-cheat-ninja-legend_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_002_off0000300d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x300D 22420 bytes
SHA-256: 86e3eb6174e57bef89a2f1e8bd8cd412a4d5250e4fbd9ede0f2064e7dd06380e
font_01_sfnt_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 19060 bytes
SHA-256: e4cea48c8b848de07e8ef101f49b72bfc571a663bf41a12e6c0852f362c111ba

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