Malicious PDF — malware analysis report

Static analysis result for SHA-256 3801ae30b834b393…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 09:00:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: bf0210420c84ea3f6bb684990336cf50 SHA-1: 9f6f60fcef297d092319512781182d6fa2a7fd1b SHA-256: 3801ae30b834b3938b7ce0ad4f321538a0c9e9b9373ed17f8901aabaf2ec1c6b
160 Risk Score

Malware Insights

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

This PDF document employs a lure of free game items and hacks to entice users into clicking malicious links. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/free-daily-spins-coin-master-2021-game-hack', are identified as malicious redirectors. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest a malicious intent to redirect users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-daily-spins-coin-master-2021-game-hack In PDF document text
    • http://addair.co.uk/images/cm-spins_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://addair.co.uk/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/coin-and-spin-link_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_off000049ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AB 26012 bytes
SHA-256: 8b400b1b13af24ba252909866fa12677ca9a06a10ec9809eea7180a583ce8863
font_01_sfnt_off00008433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8433 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE4 18708 bytes
SHA-256: c65851a3c2ccf8ba249fbb480ab00bab2dc65c52c70fe6f18183c59a9b34b022

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