Malicious PDF — malware analysis report

Static analysis result for SHA-256 4321eae12a1ad232…

MALICIOUS

PDF

41.5 KB Created: 2021-05-12 17:19:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dded3016eac1e02d630fcd6ed0eb2cc7 SHA-1: f8fe9459e071f21d5bfbf4bd4d35bb1cdf9ae915 SHA-256: 4321eae12a1ad232c097d79f285655d9063f4119c28b36317e9b5d0ac4794290
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that are identified as malicious redirectors and lures for game hacks. The primary lure directs users to 'https://netcdn.xyz/app/406889139/how-do-you-get-free-coins-in-coin-master-game-hack', which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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.
  • 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/how-do-you-get-free-coins-in-coin-master-game-hack In PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/robux-for-surveys_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_003_off0000480a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480A 24388 bytes
SHA-256: fd57436102834fe23f9e00efeb131f44c3109691ab97ea65452dd1704faecd8e
font_01_sfnt_off00007f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F89 18344 bytes
SHA-256: 266979b75a3224caa69ab43cd24a5c7188e6c45b6e44b7c360b1f701e1d93610

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