Malicious PDF — malware analysis report

Static analysis result for SHA-256 0275ab8e6ee5d8cd…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 06:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c88eb023eeaa4f3f1e2c07c2dda2a769 SHA-1: 984b2c273a6352364d646a62fe052ed7c8fa2a68 SHA-256: 0275ab8e6ee5d8cdab9e456a388cd4c3665221ef6e6dca7fd03b4b5d0002a744
122 Risk Score

Malware Insights

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

This PDF document employs a common lure for malicious content, advertising game hacks and free in-game currency to entice users. It contains multiple links to external websites that likely host further malicious content or exploit kits. The ML classifier strongly indicated maliciousness, and the presence of game hack lures aligns with typical social engineering tactics used to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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/431946152/download-apps-for-robux-game-hack PDF link annotation
    • https://pemadamapi.net/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://pemadamapi.net/images/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://pemadamapi.net/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-fan-page-free-spins_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_003_off0000460f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x460F 25608 bytes
SHA-256: 4e4ef25ab46824143ead958f5015266dd2e872901c22efc9f675971029d02b8c
font_01_sfnt_off00007f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F05 18996 bytes
SHA-256: ea235c61f7ee6ff97cb8e2e4b8381115f9ce59fc272e8f2939e83a9622de1179

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