Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b72fdcb4d109e0a…

MALICIOUS

PDF

38.1 KB Created: 2021-05-23 00:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1a798cb26d8f98e98ae65d817c0a122c SHA-1: 364fc7da92f054eb18ebc0b446e78b2bb62b48e3 SHA-256: 3b72fdcb4d109e0a8114f36fb839286b0d3484fc9bad9a09cb2819695c7cb335
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs social engineering tactics by presenting itself as a lure for game hacks or free items, specifically mentioning 'Minecraft Realms Free Trial'. It contains multiple links to known malicious redirectors and infrastructure, designed to trick users into clicking through to potentially harmful websites. The 'SE_CLICKFIX' heuristic indicates the document likely instructs users to execute commands or press key combinations, a common method to bypass security controls and initiate further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-realms-free-trial-game-hack In PDF document text
    • https://smszepce.info/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://smszepce.info/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://smszepce.info/images/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://smszepce.info/images/pokemon-go-free-stuff-codes_GM1094591345.pdfIn PDF document text
    • https://smszepce.info/images/how-to-hack-roblox-accounts-passwords_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
stream_002_off0000336b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336B 29276 bytes
SHA-256: 44fa08f2d9bdac486babdb66a6e17c96ab213cc7386a1073e7116a03bf459cfe
font_01_sfnt_off0000750a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750A 17900 bytes
SHA-256: 5e9e7e4dd5050dedb25c4bef302629088f41d3cb5f82066cb4e6c0f6a9bca7dc

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