Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f47220d23a4bfe0…

MALICIOUS

PDF

45.9 KB Created: 2021-06-11 11:27:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cbf98548001726ebe067509a09eae34b SHA-1: 685fbe56f56470a5db171fb8130f6a74275ebf0f SHA-256: 9f47220d23a4bfe082f70f97563c97c1dc493d45cb9f34bece570fad85d12848
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains lures for game hacks and free items, directing users to a known malicious redirector. The embedded URL 'https://netcdn.tw/app/431946152/how-to-get-roblox-clothes-for-free-2021-game-hack' is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a likely attempt to exploit vulnerabilities or trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-roblox-clothes-for-free-2021-game-hack In PDF document text
    • https://newenglandafs.com/images/tik-tok-free-fire-judul-lagu_GM835599320.pdfIn PDF document text
    • https://newenglandafs.com/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/robux-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/lohith-gaming-free-robux-6k_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/robux-adder_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/como-descargar-y-usar-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-2021-november_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_004_off0000514f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514F 27908 bytes
SHA-256: 33e6f1fd4116620d9d36c3105523a7d4309c3ded968ca59f6c3282ede4d01020
font_01_sfnt_off00008f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F55 18784 bytes
SHA-256: 794f17fb33e84b67a94151c4f47dfa9afcf0ffe9c112bc70ad4668b1b2caf7a5

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