Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4de9697c3c26e7…

MALICIOUS

PDF

39.9 KB Created: 2021-05-21 05:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8f102d57879efa93af4a4593f056f5fa SHA-1: 4ff7223253e3f93341ccc00b07b2c5221178aa72 SHA-256: 7b4de9697c3c26e75f0a5a3465ea79df7d9147c6234c9e6ed129ccd47bfbee3e
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 0.8060

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/479516143/how-to-get-minecraft-for-free-on-ipad-game-hack PDF link annotation
    • https://www.modestuae.com/uploaded_files/userfiles/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_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_off0000356c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x356C 26228 bytes
SHA-256: a20076a855873c22375dfa1d6aa79229e45e000a1b4f618e6140c7b7c9fc801c
font_01_sfnt_off000070b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B4 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00007ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 18224 bytes
SHA-256: 9e691df568453236f4d0ad162bd2f3ab3ed053816089b7695d089a9ceca8acc7

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