Malicious PDF — malware analysis report

Static analysis result for SHA-256 053f5424122bbddd…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 01:09:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0b0bab67ceaa691c42146e4a47a120ed SHA-1: ad73d87eba1c2017614401bdbf137612621ce24e SHA-256: 053f5424122bbddd8918631fb140fd8c95f07482cb49f04f3b8ebdc32a669f63
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 0.7067

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 https://netcdn.xyz/app/835599320/is-tiktok-free-on-iphone-game-hack PDF link annotation
    • http://geopaper.ge/images/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://geopaper.ge/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://geopaper.ge/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://geopaper.ge/images/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://geopaper.ge/images/free-coin-master-credit_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_002_off00002f0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0F 23724 bytes
SHA-256: a0068160cadea44a64e0432cfae7094e083f3833549ad6b10349b05ddd423738
font_01_sfnt_off0000648a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 3124 bytes
SHA-256: d6dd29adb69da7f9a23a5e3791282a61e2f811794f560a0c409c8747766d9102
font_02_sfnt_off00006f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F43 17796 bytes
SHA-256: 12273cf5ff66d6a00b456607523e095aaeb1a02d8110cb403ff190aadbe7628b

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