Malicious PDF — malware analysis report

Static analysis result for SHA-256 790c532cec0039aa…

MALICIOUS

PDF

46.0 KB Created: 2021-05-12 11:05:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 555170ef3bfc03af869c3e680f5161fa SHA-1: a3c2a8f8695a9e6375802434c5a117712156bf9a SHA-256: 790c532cec0039aab7e0a7400a5c2c5f945053de490da6425b87ef272e3d6331
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game currency or hacks, directing users to known malicious redirectors. The document body contains obfuscated text and multiple embedded URLs that are likely part of a phishing or scam campaign. No scripts were extracted, but the presence of malicious redirectors and the lure strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-to-get-20210-robux-for-free-game-hack In PDF document text
    • http://colegioluisamigo.cl/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/roblox-rape_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://colegioluisamigo.cl/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004904.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4904 25960 bytes
SHA-256: fd1ef722d7bc161a571f142c28f9f19b565117fdaa83bbda102e7e81a8d42fc7
font_01_sfnt_off0000833b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833B 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE2 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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