Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc3a10e2809f2e1…

MALICIOUS

PDF

38.8 KB Created: 2021-04-22 16:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad0cb358733f44245c4082ec5cc8ef48 SHA-1: 2b2fcac59903064164e55c7784b320735b41edbc SHA-256: bdc3a10e2809f2e120a9087cc6d5d6e2822d6160a6205b4d31ce2c3b09c3d056
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://netsecure.pro/app/431946152/free-robux-no-verify-ios-game-hack PDF link annotation
    • http://apcupschennai.com/images/free-dino-hat-roblox.pdfIn PDF document text
    • http://apcupschennai.com/images/earn-free-robux-legit.pdfIn PDF document text
    • http://apcupschennai.com/images/roblox-free-game-card-25.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-change-name-on-roblox-free.pdfIn PDF document text
    • http://apcupschennai.com/images/youtube-free-robux-and-obc.pdfIn PDF document text
    • http://apcupschennai.com/images/free-roblox-gift-card-codes-no-survey-or-human-verification.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-cheat-speed-in-roblox.pdfIn PDF document text
    • http://apcupschennai.com/images/tycoon-hack-roblox.pdfIn PDF document text
    • http://apcupschennai.com/images/free-item-with-card-purchase-roblox.pdfIn PDF document text
    • http://apcupschennai.com/images/cheat-engine-roblox-tutorials.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_off00003e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E58 24232 bytes
SHA-256: 117d8911adaedc5714b4a1111c9698656f3375872e4d4f54f0ede7f90022d0ef
font_01_sfnt_off0000751b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 18448 bytes
SHA-256: 32de364ebf089e3d7de52c61e66f4fd318f01e80231c499158c20d7726278268

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