Malicious PDF — malware analysis report

Static analysis result for SHA-256 e922f822c5d278d1…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 02:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: df858971a5b0b35a09123d4bb9f34578 SHA-1: 09487bce0bfae73af125a6b6a20b9693c58e5a1d SHA-256: e922f822c5d278d180333702280fad3f9cd3605e8d1518f5e17f637306ce0e18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a 'Coin Master Hack' lure, indicating a social engineering attempt to trick users into visiting malicious sites. The presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent. No scripts were extracted, but the document's structure and embedded links are designed to lead the user to download or interact with further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-spins-and-coins-unlimited-free-game-hack In PDF document text
    • http://smartint.com.my/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://smartint.com.my/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://smartint.com.my/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://smartint.com.my/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://smartint.com.my/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://smartint.com.my/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://smartint.com.my/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://smartint.com.my/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://smartint.com.my/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://smartint.com.my/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A03 25336 bytes
SHA-256: a64f4873ecb21d405d08d96c6130d3b884372ebfa3a6a06a3746d4fc9a3c32f1
font_01_sfnt_off00008384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8384 18752 bytes
SHA-256: 9894c068b10d635aa02e8d25afb59d141e90fd875449b50e52c6a3fbfc43112a

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