Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea8660fa3de59d8…

MALICIOUS

PDF

46.4 KB Created: 2021-06-11 03:34:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 81de249e87abe96983ee5740bd199efd SHA-1: d9b1545a17b5972aa0c7dbe253e2f8867aa70fab SHA-256: 5ea8660fa3de59d8e9d602b9a93c8c7bba55911caf78950330a23996255c6c63
200 Risk Score

Malware Insights

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

This PDF document impersonates Microsoft to lure users with a "game hack" promise, directing them to malicious redirector infrastructure. The document body contains obfuscated content and embedded URLs that are indicative of a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the impersonation lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-hack-into-a-roblox-account-2021-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.tw/app/431946152/how-to-hack-into-a-roblox-account-2021-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-android-hack-mod_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-roblox-on-iphone-6_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/script-to-hack-code-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-items_GM406889139.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
font_00_sfnt_off000053dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DD 27328 bytes
SHA-256: 5cc597210c12dee987609325758353f9958bfe15cb4b7abdf0859798990c8590
font_01_sfnt_off00009080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9080 18992 bytes
SHA-256: 5ed2de644d1e8f3f7c5fbdbdd0f00e774b39ca57433179e4a948f36f761c6b02

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