Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a4fa9465246740…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 02:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 075844f91b8ca700fa2e8027951e28e5 SHA-1: 3585037c026b252d83f4670d71d746c581ff04cf SHA-256: e3a4fa9465246740348aecc492c22b540fbfc640b950e46fc36f0a752707195d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to 'free coin spin', 'game hack', and 'free robux', directing users to malicious websites. The primary lure is 'free-coin-spin-game-hack' hosted on netcdn.tw. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-coin-spin-game-hack PDF link annotation
    • http://pustaka.keperawatan.unand.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-hack-v6-5-mythical_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-robux-2021-march_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/is-there-a-way-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-obc-codes-roblox-unused_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/100-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-spins-coin-master-apple_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_002_off00002efe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EFE 22488 bytes
SHA-256: db86cb2b3dbea0a97d631bc51f3360a709ef887da935436fc37171d368d9bcbc
font_01_sfnt_off00006178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 18068 bytes
SHA-256: 5cdce12a2ced4ada3e3ad0a93e25fb25901a32c636ecd7756d9ca4c67bf1a105

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