Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa0614c09198c04…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 09:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f77ffa47f84e95f52a672fa935b369e4 SHA-1: 36ac9c1fc9560536839c9d3c9bddb43abf255cf5 SHA-256: cfa0614c09198c04ade061ad89318b5fe6da4d4bcf6cabdf26627d48ef620790
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks and free currency, directing users to external URLs. The presence of embedded URLs and the heuristic firing for a 'game hack' redirect lure strongly suggest a social engineering tactic to lead users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-roebucks-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-link-in-coin-master-game_GM406889139.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
stream_004_off0000538a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x538A 25244 bytes
SHA-256: dc4a5d22302a7a7ea662995211b9279e8d75ebfe2d349df16171cb3907bfdbbb
font_01_sfnt_off00008ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCF 17972 bytes
SHA-256: 60768b29a45169123c775a336c15772b774497df18e699e4ee663c92ad74688c

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