Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82fb2b15c7440cd…

MALICIOUS

PDF

32.0 KB Created: 2021-07-19 10:10:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fd882040da79b35c0771595755926b2e SHA-1: 54764f1303eca0840dea701455a4c30091e9a8de SHA-256: b82fb2b15c7440cddd7f2175e96c48a10778baeabe6e5979d230f5f040e38f4c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a game hack generator, a common lure for malicious content. The embedded URL 'http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-ps4-game-hack' is highly suspicious and likely leads to a phishing or malware download site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into navigating to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-get-minecraft-for-free-on-ps4-game-hack PDF link annotation
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_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
stream_002_off0000295d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x295D 22728 bytes
SHA-256: 7354a9457a599f76216212eb45777ff0f38ab182f65d4ccb3121263e9835fc37
font_01_sfnt_off00005c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1A 18088 bytes
SHA-256: 3c584cfdb2e84eddbd4369948c7cb3512903decb89ab4dae7c156f2377516814

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