Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19b8df3c00034bd…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 14:08:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7687dd51d08d847408af6689cb9fc5cc SHA-1: 100b0e0008265ca1462ceb12f989969876fb2e0d SHA-256: a19b8df3c00034bdbba4364eed73fd3725c6724306881376c87dc9f69d76007d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/google-how-do-you-get-robux-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/c-design-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/beyond-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/bit-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-google-free-items_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-forums-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-websites-scam-link_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-make-a-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-roblox-with-nmap_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_off0000302d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302D 21912 bytes
SHA-256: 6099d3cc4bdd22d73be659305f3a64ef8b2248dac8eb07cb3928404f73126af6
font_01_sfnt_off0000606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606A 19224 bytes
SHA-256: 815f438ce9b8f460b92c3883230c0cf18781a12c2093eb3c3c738a042bc7c65e

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