Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ac74bf57313080…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 12:15:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b000f6ade07b4a643062a217ca627b70 SHA-1: b2a71037818c9a1c4cc0d1f3c05acd816776ed4e SHA-256: b9ac74bf57313080dba6ceb00b80b5ff94fa48df772255de48469653f693fc78
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to websites offering game hacks and generators, such as 'coin-master-hack-apk-download-for-android-game-hack'. This indicates a lure-based attack pattern designed to trick users into visiting potentially malicious sites. The presence of a large number of external links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-hack-apk-download-for-android-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/youtube-how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hawt-sauce-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-run-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-hack-no-download-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-car-crushers-2-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-on-iphone-5_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/overhol-roblox-free-shop_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-robux-hack-tool_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-lohith-gaming_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-admin-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-pastebin-link_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/como-ser-hacker-en-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-net_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_off0000312c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312C 22272 bytes
SHA-256: dd12528cc9fe29440ddf355c47ef62c6b1e7d173e2bca19ac05cd251ec9d871c
font_01_sfnt_off00006286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 18924 bytes
SHA-256: 1cf9981fa265b31f69f9f07c7993afa1bce844b0d5c7655559eae79f3315a78a

Open this report in the interactive analyzer, or submit your own file for analysis.