Malicious PDF — malware analysis report

Static analysis result for SHA-256 397df4ffa0e830cb…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 21:09:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 55299644200c4b3f048e2f94dcb5d8b8 SHA-1: 6a15b4fc5d7f01781eeec338f5529c02ce8d0ea0 SHA-256: 397df4ffa0e830cb83ab5d3346abff7b1fa22803d5ec2f2bde83acfb44a92d8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'game hack'. The document body and embedded URLs reinforce this by pointing to sites offering free spins, Robux, or game hacks. This indicates a social engineering lure designed to redirect users to potentially malicious content or phishing sites.

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.tw/app/406889139/coin-master-daily-free-spins-2021-game-hack In PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-roblox-plaza-money_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/roblox-free-doge-hat_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/114-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-roblox-clothes-no-gltich_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22360 bytes
SHA-256: 766b19ffdfeec11cef174a1f77007e03f3cda9235dd0979035477367eb294be2
font_01_sfnt_off000060b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 19000 bytes
SHA-256: 528a935dd58865e4a106a1d117939a17801f064f5f0487dbd1677077be344488

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