Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae267555e8e403c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 22:00:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 95beb83371148a92b190c38fe834f924 SHA-1: e4cbf361902ef1e7c84ed35cc86485e0d354daaf SHA-256: 7ae267555e8e403cd0ab3bee35929f6de4c97899366666f8303e2d682f0037bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-app-hacks-game-hack, which is designed to lure users with promises of game hacks. The document body and embedded URLs reinforce this lure by referencing 'Coin Master App Hacks' and 'Roblox free Robux'. While no scripts were explicitly extracted, the PDF structure and malicious links suggest an attempt to redirect users to potentially harmful content or downloads.

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/406889139/coin-master-app-hacks-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/does-roblox-allow-free-rebux-websites_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/premium-software-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-50-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hacks-for-roblox-legit-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-boy-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/map-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-roblox-to-get-robux-2021_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_off0000344a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x344A 22680 bytes
SHA-256: 1413bc59e594224e9ababa51b387fef03e13d765c7bfebdb42f94746e5d6050c
font_01_sfnt_off000066f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 18180 bytes
SHA-256: 7da720255189ee7148b3a15459f8235b370ac0c6f406201341355dab7c471ca0

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