Malicious PDF — malware analysis report

Static analysis result for SHA-256 a594b4cb0a1344b9…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 12:57:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7dabe1cf077ea84a7215b6a9c002720 SHA-1: dc516e1b8b6be533c8d87b4f7c771086a486e8b3 SHA-256: a594b4cb0a1344b9a7a7e1771e3c29291bac48ea2eccb2ab391cce52a0fa5c01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The ML classifier strongly indicated maliciousness, and the document body reinforces the lure by including URLs related to such scams. No scripts were extracted, but the primary attack pattern involves social engineering via deceptive links.

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.co/app/431946152/filter-hacks-roblox-game-hack In PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/slurp-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/hack-roblox-weight-lifting-simulator-3_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox-hack-free-robux-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox-free-premium-method-v3rm_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/pokemon-go-free-eggs_GM1094591345.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox-robux-hack-script_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/www-roblox-com-games-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_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_off000030ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EC 22152 bytes
SHA-256: 86614c3dd3dc0e93a1e696245cd08382953c44d852cb7d9da4726ced51169031
font_01_sfnt_off000061ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 19044 bytes
SHA-256: 914b8850262a0f810fa089f6f6391e55e4c6b87d940545fa80e8b798b61cddfd

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