Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8d97cdace711d5…

MALICIOUS

PDF

43.8 KB Created: 2021-05-17 20:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31acbcd965989518fea49c30f89f56bd SHA-1: 36818eb34fe38c4dfbe8ee35a5862944b386b563 SHA-256: 0b8d97cdace711d553731f9859cdee8edd6f9ca2cd7641552765ba2e7ae2d343
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a 'game hack' generator, aiming to lure users into downloading further content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or social engineering attack pattern. No scripts were extracted, limiting the analysis of direct execution or payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/how-much-robux-can-you-get-with-1-million-dollars-game-hack In PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/get-robux-now_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_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
stream_003_off00004c67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C67 24760 bytes
SHA-256: e6b91c6bcf63dbb16daaa82b784ef05de27bb2ff456f8287b6299f3ca0d735dc
font_01_sfnt_off00008540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 19536 bytes
SHA-256: 876d9410c613bd28eae874a8e258613decc08a63963b9dc9af550a443a712a6c

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