Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b88322b1f73582…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 14:47:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aee6b299cdb94a6752f31af86b89b34b SHA-1: c942e1a1014011f676942a30d66efb8317e161d2 SHA-256: 70b88322b1f735826f7b4795a834ebcec5a36c127dec9afe7d1ac83ae0784bf2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-redeem-code-robux-game-hack. The document body and embedded links suggest a lure for game-related cheats or currency, which is a common social engineering tactic. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or malware distribution attempt.

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/free-redeem-code-robux-game-hack In PDF document text
    • http://perpus.stmik-im.ac.id/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-just-freind-me_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-hack-download-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-rainbow-knife-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-20210_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-f-88-gun-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/pubg-uc-30_GM1330123889.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/1-robux-every-second-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robloxcom-how-to-get-free-robux-only-today-ad_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-codes-generator-no-surverys_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-get-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-devil_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
font_00_sfnt_off00003032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3032 22696 bytes
SHA-256: f67bf5df3c1e1a6254a0703ace68667efe2bdd26f12701b469c5d3f47e86baa6
font_01_sfnt_off000062e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E4 19152 bytes
SHA-256: cd73a9e07245fbe882d92d4ab7e7893fa390617ee7c227c8a14f258746885c23

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