Malicious PDF — malware analysis report

Static analysis result for SHA-256 023ce69884e4e3b2…

MALICIOUS

PDF

48.2 KB Created: 2021-05-14 21:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 634a3994f117b7e186c68433dde8bc9c SHA-1: 6a9d9e7dd34f7c8c52c070d2a4ecf695359a68db SHA-256: 023ce69884e4e3b2c5574c74551cd60e8d14e3476359f313b0e368f0847d2b4c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising "free Robux" or "game hacks" to lure victims. The primary malicious URL identified is https://netcdn.xyz/app/431946152/earn-free-robux-today-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites, likely as part of a broader credential harvesting or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/earn-free-robux-today-game-hack In PDF document text
    • http://teksomak.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://teksomak.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://teksomak.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://teksomak.com/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cb1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB1 30172 bytes
SHA-256: 9079cd82d450fa0e4b34c4e4aacf86b7197192e91432ab3abce35d66b47a457f
font_01_sfnt_off00008f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F50 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000098ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FF 18596 bytes
SHA-256: 856adb635f1df42b1ab7aec7f905735c2cb2dfebd4088312a1c80dc48447787c

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