Malicious PDF — malware analysis report

Static analysis result for SHA-256 939b237371c422af…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 20:05:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2488aeddc4bc345ec992aac812dfca19 SHA-1: fa71f2a70e5fece4f6d15ed47cb165891dff84e5 SHA-256: 939b237371c422afb13edbba2b7b1db6fd66a3ee224dfed80af0c55d6becff76
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware download or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/robux-generator-without-verification-game-hack In PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/abd-roblox_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/freecoins_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/hack-roblox-players_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_off00004ddc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DDC 26936 bytes
SHA-256: 6abc3490e1b458bee8cb5045db5d0d3a94134bab7783ac958e8f2eee947027e0
font_01_sfnt_off00008a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 18800 bytes
SHA-256: 7a1699424a486bcfa4df415b867af9f99e06be81e984b6abcb7de7a1603b39ab

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