Malicious PDF — malware analysis report

Static analysis result for SHA-256 efad51fb5d97b71f…

MALICIOUS

PDF

46.2 KB Created: 2021-05-12 12:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7edcb5f5e291d3be1aa1f7cd61483831 SHA-1: 69f66dd7823208bebe207adee88e150c6cf33573 SHA-256: efad51fb5d97b71fdb1698f8b1d48ad1a96eba313cbb1b8e4575fb7abb6c794d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that lead to websites offering game hacks and free currency, a common lure for credential phishing or malware distribution. The heuristic 'SE_MFA_LURE' suggests a potential attempt to harvest multi-factor authentication codes or session tokens. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a malicious workflow designed to exploit user interest in online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.xyz/app/406889139/free-spins-coin-master-2021-game-hack PDF link annotation
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/earn-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CA 26132 bytes
SHA-256: 6fefdfabe8976330ab75b22a8fa7cd3efbf5122e3e896172f654a024480ef6cd
font_01_sfnt_off00008537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8537 3620 bytes
SHA-256: d859fd77b85f3b3415639a87e8809ecf698e2c52ea4a2633c07d9e96259cae8a
font_02_sfnt_off000091fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FA 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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