Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa334e981fe7d23…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 06:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2ada1f723bc4d4dfa09311aa5392be46 SHA-1: be1958a7c844a851658dfbb81f42e9e0fb465a23 SHA-256: 6aa334e981fe7d23ffa8bb47980df77e72ab63a9ac1321665f8593496f2eb32f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users with promises of game hacks and free currency, directing them to a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting malicious sites. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-know-if-someone-is-hacking-on-roblox-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-draw-2-hak_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-from-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-999999-robux-2021-pc_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-mobile_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-cheat-engine-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-aimbot-hack-phantom-forces_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/10-ways-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-games_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_off00002f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1E 22312 bytes
SHA-256: 7df17e5cd3fb09c295cf2ec62c2673c370008645ea2282e4b2810b3220c947bc
font_01_sfnt_off00006033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 19016 bytes
SHA-256: 064df8c48a5965145c25654057246a7ac832d3e6ab26dc4bb5c5aa33f560621c

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